USPTO Examiner CHANG DANIEL D - Art Unit 2844

Recent Applications

Detailed information about the 100 most recent patent applications.

Application NumberTitleFiling DateDisposal DateDispositionTime (months)Office ActionsRestrictionsInterviewAppeal
19079178LUMINAIRE SAFETY SYSTEMMarch 2025July 2025Allow410NoNo
19015577AMBIENT LAMP APPARATUS AND LIGHTING-EFFECT LAYER COORDINATED PLAYBACK METHOD AND DEVICE, MEDIUMJanuary 2025May 2025Allow400NoNo
18878092POWER CONSUMPTION CONTROL CIRCUIT, CHIP AND ELECTRONIC DEVICEDecember 2024June 2025Allow500NoNo
18984779SPLICING LAMP, DETECTION EXECUTING METHOD, AND DETECTION DRIVING METHODDecember 2024June 2025Allow610NoNo
18940244ACTIVE GATE DRIVERNovember 2024March 2026Allow1600NoNo
18896064LAMP AND CONTROLLER THEREOF, AND LIGHTING EFFECT COORDINATED PLAYBACK METHOD AND DEVICESeptember 2024February 2025Allow500NoNo
18895335DISPLAY APPARATUSSeptember 2024February 2026Allow1600NoNo
18817852FAILSAFE INPUT-OUTPUT CIRCUITAugust 2024January 2026Allow1700NoNo
18785242CONTROLLING GROUPS OF ELECTRICAL LOADS VIA MULTICAST AND/OR UNICAST MESSAGESJuly 2024February 2026Allow1900NoNo
18784419OFF-FIXTURE LIGHTING CONTROL CIRCUITJuly 2024October 2025Allow1431YesNo
18782597MUSIC VISUALIZATION METHOD FOR LIGHT SHOW AND APPARATUS THEREOFJuly 2024March 2026Allow2010NoNo
18832009PROCESSING METHOD, ASYNCHRONOUS CIRCUIT, AND LOGIC CIRCUITJuly 2024March 2026Allow1901NoNo
18777717NEGATIVE VOLTAGE LEVEL SHIFTERJuly 2024March 2026Allow2010NoNo
18758919SYSTEM AND METHOD FOR DRIVING AND CONTROLLING LIGHT SOURCESJune 2024February 2026Allow2010NoNo
18741690IMAGE GENERATING DEVICE AND COMMUNICATION CIRCUIT THEREOFJune 2024February 2026Allow2000NoNo
18738893OPTIMIZING CENTRAL PROCESSING UNIT (CPU) CACHE MEMORY DC POWER WITH RAIL VOTING SCHEMEJune 2024November 2025Allow1700NoNo
18717243PHYSICALLY UNCLONEABLE FUNCTION AS SECURE STORAGEJune 2024March 2026Allow2110NoNo
18678809LIGHT SOURCE DEVICE, OBSERVATION SYSTEM, AND COLOR-BALANCE CORRECTION METHODMay 2024October 2025Allow1600NoNo
18670175VARIABLE INPUT DEVICE UTILIZING TIME-OF-FLIGHT OF AN OPTICAL TRANSMISSION THROUGH A DISCONTINUOUS OPTICAL GUIDEMay 2024November 2025Allow1800NoNo
18663791SEMICONDUCTOR DEVICE AND OPERATING METHOD THEREOFMay 2024January 2026Allow2010NoNo
18707900SOUND RANGING AND LUMINAIRE LOCALIZATION IN A LIGHTING SYSTEMMay 2024December 2024Allow700NoNo
18620961LIGHTING SYSTEM INCLUDING A FAST LOW-POWER STARTUP CIRCUITMarch 2024February 2026Allow2310NoNo
18612278FUSED MEMORY AND ARITHMETIC CIRCUITMarch 2024October 2025Allow1900NoNo
18610608LIGHT-EMITTING DIODE CIRCUIT WITH PARALLEL SEQUENCE FUNCTION, LIGHT-EMITTING DIODE CIRCUIT PACKAGE, AND LIGHT-EMITTING DIODE LIGHT STRINGMarch 2024September 2025Allow1800NoNo
18605996PLASMA PROCESSING APPARATUS, POWER SUPPLY SYSTEM, CONTROL METHOD, PROGRAM, AND STORAGE MEDIUMMarch 2024February 2026Allow2300NoNo
18595937Dimmer-Type Dimming Power SupplyMarch 2024October 2025Allow1910NoNo
18437535HYSTERESIS CIRCUIT, EMERGENCY LIGHTING CIRCUIT AND LIGHTING DEVICEFebruary 2024December 2025Allow2210NoNo
18433824Systems and Methods For A Multichannel Navigation LightFebruary 2024August 2025Allow1900NoNo
18409986ULTRA-BROADBAND LOOP ANTENNA FOR WIRELESS COMMUNICATION AND ENERGY TRANSCEIVERJanuary 2024January 2026Allow2410NoNo
18411001Antenna Adjustment Device and Method for Communication SystemJanuary 2024February 2026Allow2620NoNo
18409747ELECTRONIC DEVICE AND MANUFACTURING METHOD THEREOFJanuary 2024February 2026Allow2510NoNo
18407727INTEGRATED CIRCUIT AND METHOD OF FORMING THE SAMEJanuary 2024April 2025Allow1501NoNo
18393736Circuits, Machines and Systems that HealDecember 2023November 2025Allow2311NoNo
18390667CONTROL DEVICE HAVING AN INTEGRAL REFLECTING STRUCTURE FOR A SENSING CIRCUITDecember 2023July 2025Allow1900NoNo
18540935Logic Circuit and Front End Module including the sameDecember 2023October 2025Allow2210NoNo
18529675ANTENNA SUBSYSTEM WITH ANALOG BEAM-STEERING TRANSMIT ARRAY AND SPARSE HYBRID ANALOG AND DIGITAL BEAM-STEERING RECEIVE ARRAYDecember 2023November 2024Allow1200NoNo
18526868CONTROLLER AND LUMINAIRE HAVING CONTROLLERDecember 2023October 2025Allow2320YesNo
18522906ARRANGEMENT OF SOURCE OR DRAIN CONDUCTORS OF TRANSISTORNovember 2023February 2025Allow1510YesNo
18516615BUFFER CIRCUIT CAPABLE OF REDUCING NOISENovember 2023June 2025Allow1900NoNo
18513653LIGHTING DEVICE POWER SUPPLYING SYSTEM HAVING SWITCHING MECHANISMNovember 2023June 2025Allow1900NoNo
18509526HIGH-VOLTAGE LIGHT STRING CONTROLLERNovember 2023October 2025Allow2310NoNo
18559165POWER CONTROL OF A LIGHT ANIMATION PERFORMED ON A LIGHT MODULENovember 2023June 2025Allow1900NoNo
18501993LOGIC DRIVE BASED ON STANDARD COMMODITY FPGA IC CHIPS USING NON-VOLATILE MEMORY CELLSNovember 2023March 2025Allow1610NoNo
18500903SYSTEMS AND METHODS FOR PROVIDING POWER SUPPLY TO CURRENT CONTROLLERS ASSOCIATED WITH LED LIGHTINGNovember 2023June 2025Allow2000NoNo
18498852BUFFER CIRCUIT, SEMICONDUCTOR DEVICE, AND SIGNAL PROCESSING SYSTEM INCLUDING SEMICONDUCTOR DEVICEOctober 2023August 2025Allow2210NoNo
18288901PHASE SHIFTER, ANTENNA AND ELECTRONIC DEVICEOctober 2023May 2025Allow1900NoNo
18491830SIGNAL ANALYSIS PROTOCOL CHANGING METHOD FOR WIRELESS LAMPOctober 2023August 2025Allow2210NoNo
18379360SYSTEM AND METHOD OF COMMISSIONING A BUILDING CONTROL SYSTEMOctober 2023August 2024Allow1110NoNo
18375547LOGIC DRIVE BASED ON MULTICHIP PACKAGE COMPRISING STANDARD COMMODITY FPGA IC CHIP WITH COOPERATING OR SUPPORTING CIRCUITSOctober 2023November 2024Allow1300NoNo
18374046LIGHT EMITTING DEVICE AND LAMP ASSEMBLYSeptember 2023August 2024Allow1110NoNo
18284724LIGHTING CONTROL BASED ON A CO-LOCATED ACTIVE ANTENNA ARRAYSeptember 2023June 2025Allow2010NoNo
18551574Method for Configuring a Luminaire System and Device for Use ThereinSeptember 2023December 2025Allow2710NoNo
18550993LED control systemSeptember 2023April 2025Allow1910NoNo
18453950System Having Independent Control of Circadian Response and Color TemperatureAugust 2023December 2025Allow2720NoNo
18233724LED CIRCUITS AND ASSEMBLIESAugust 2023July 2025Allow2330NoNo
18448129MODIFIED RADAR ANTENNA ARRAYAugust 2023July 2025Allow2310NoNo
18228454METHODS AND APPARATUS TO SUPPLY POWER TO LED CIRCUITRYJuly 2023October 2025Allow2710NoNo
18359944Quantum Controller with Multiple Pulse ModesJuly 2023November 2024Allow1610NoNo
18358316Faceplate Remote Control Device for Use in a Load Control SystemJuly 2023January 2025Allow1800NoNo
18222682METHOD AND APPARATUSES FOR CONTROLLING THE OUTPUT VOLTAGE OF A VOLTAGE REGULATORJuly 2023September 2024Allow1410NoNo
18220976RADIATOR FOR TERAHERTZ ELECTROMAGNETIC RADIATIONJuly 2023August 2025Allow2510NoNo
18351303COMPACT FREQUENCY RECONFIGURABLE ARRAY ANTENNA BASED ON DIAGONALLY PLACED MEANDER-LINE DECOUPLERS AND PIN DIODES FOR MULTI-RANGE WIRELESS COMMUNICATIONJuly 2023August 2025Allow2500NoNo
18271087ADJUSTING A ROUTINE IN DEPENDENCE ON A DIFFERENCE BETWEEN CURRENT AND EXPECTED STATESJuly 2023December 2024Allow1700NoNo
18347376On-Die TerminationJuly 2023January 2025Allow1900NoNo
18346273LOW VOLTAGE DIFFERENTIAL SIGNALING RECEIVERJuly 2023August 2025Allow2601NoNo
18269980REQUESTING A LIGHTING DEVICE TO CONTROL OTHER LIGHTING DEVICES TO RENDER LIGHT EFFECTS FROM A LIGHT SCRIPTJune 2023December 2024Allow1800NoNo
18343406METHOD AND SYSTEM FOR INTEGRATED CONTROLLING TO A PLURALITY OF LIGHTING DEVICES AND THE LIGHTING DEVICESJune 2023May 2025Allow2310NoNo
18341927APPARATUSES AND METHODS FOR IDENTIFYING MEMORY DEVICES OF A SEMICONDUCTOR DEVICE SHARING AN EXTERNAL RESISTANCEJune 2023August 2024Allow1410NoNo
18339989UNIVERSAL SERIAL BUS VOLTAGE DISCHARGEJune 2023July 2025Allow2410NoNo
18258801ANTENNA MODULEJune 2023May 2025Allow2310NoNo
18339232Fast Common Mode ChargingJune 2023June 2025Allow2410YesNo
18334114ELECTRONIC CHIP IDENTITYJune 2023June 2025Allow2510YesNo
18333764TANKER TRUCK WITH REAR LIGHTING ASSEMBLY AND METHOD OF OPERATIONJune 2023February 2026Allow3210NoNo
18265593EFFICIENT MULLER C-ELEMENT IMPLEMENTATION FOR HIGH BIT-WIDTH ASYNCHRONOUS APPLICATIONSJune 2023June 2025Allow2410NoNo
18320635FILL LIGHT AND POWER SUPPLY CIRCUIT THEREOFMay 2023January 2024Allow810NoNo
18320168ADAPTIVE INTEGRATED PROGRAMMABLE DEVICE PLATFORMMay 2023November 2024Allow1811YesNo
18036663INTELLIGENT LAMP, SIGNAL ADAPTIVE IDENTIFICATION METHOD THEREFOR, AND COMPUTER-READABLE STORAGE MEDIUMMay 2023January 2024Allow910NoNo
18315656ELECTRONIC DEVICE AND CONTROL METHOD THEREOFMay 2023April 2025Allow2300NoNo
18313427CUSTOMIZABLE LOGIC CELL WITH METHODS TO FORM SAMEMay 2023November 2025Allow3020YesNo
18144076PROVIDING INDUSTRIAL NETWORK RELIABILITY USING LUMINAIRESMay 2023September 2025Abandon2910NoNo
18312807Control Circuit of Power Factor Improvement Circuit and Semiconductor Integrated Circuit DeviceMay 2023November 2024Allow1910NoNo
18250549METHOD FOR OPERATING AN AUTOMOTIVE LIGHTING DEVICE AND AUTOMOTIVE LIGHTING DEVICEApril 2023January 2025Allow2110YesNo
18250548METHOD FOR OPERATING AN AUTOMOTIVE LIGHTING DEVICE AND AUTOMOTIVE LIGHTING DEVICEApril 2023January 2025Allow2110YesNo
18033201MONOLITHIC BUS SLAVE CIRCUIT STRUCTUREApril 2023July 2023Allow300NoNo
18137278MEASUREMENT BASED UNCOMPUTATION FOR QUANTUM CIRCUIT OPTIMIZATIONApril 2023August 2024Allow1610NoNo
18030756TEMPERATURE SENSING FOR A MICRO-LED ARRAYApril 2023August 2023Allow500NoNo
18184061ANTENNA MODULE AND COMMUNICATION DEVICE INCORPORATING THE SAMEMarch 2023January 2025Allow2200NoNo
18026228DUAL-POLARIZED ANTENNA AND ELECTRONIC DEVICEMarch 2023April 2025Allow2510NoNo
18182867RESETTABLE LIGHTING SYSTEM AND METHODMarch 2023January 2024Allow1010NoNo
18245141BASE STATION ANTENNAS HAVING COMPACT DUAL-POLARIZED BOX DIPOLE RADIATING ELEMENTS THEREIN THAT SUPPORT HIGH BAND CLOAKINGMarch 2023November 2024Allow2000NoNo
18182782SEMICONDUCTOR DEVICE IINCLUDING DELAY-ENHANCED INVERTER CIRCUIT AND METHOD OF FORMING SAMEMarch 2023January 2026Allow3411YesNo
18179957ELECTRONIC CIRCUITRYMarch 2023April 2025Allow2510NoNo
18044303Antenna for Foldable Electronic Device and Foldable Electronic DeviceMarch 2023October 2024Allow1900NoNo
18118430Information Handling System Docking Station Including a Current Trapper for Intra-Band, Multi-Radio IsolationMarch 2023April 2025Allow2620NoNo
18177394ELECTRONIC DEVICE INCLUDING ANTENNASMarch 2023February 2025Allow2410YesNo
18115016NEW RING COUPLING STRUCTURE FOR LINEAR ACCELERATORFebruary 2023February 2025Allow2310NoNo
18024022PHASE SHIFTER, METHOD FOR MANUFACTURING SAME, AND ELECTRONIC DEVICEFebruary 2023August 2024Allow1800NoNo
18023068CONTROLLING AN ARRAY OF LIGHT SEGMENTS BASED ON USER INTERACTION WITH VIRTUAL REPRESENTATIONS IN COLOR SPACEFebruary 2023January 2025Allow2310NoNo
18169988PROGRAMMABLE LOGIC DEVICE WITH FINE-GRAINED DISAGGREGATIONFebruary 2023September 2024Allow1920NoNo
18169570WIDE RANGE FREQUENCY TUNABLE CUBESAT ANTENNAFebruary 2023September 2024Allow1900NoNo

Appeals Overview

This analysis examines appeal outcomes and the strategic value of filing appeals for examiner CHANG, DANIEL D.

Patent Trial and Appeal Board (PTAB) Decisions

Total PTAB Decisions
3
Examiner Affirmed
2
(66.7%)
Examiner Reversed
1
(33.3%)
Reversal Percentile
53.0%
Higher than average

What This Means

With a 33.3% reversal rate, the PTAB reverses the examiner's rejections in a meaningful percentage of cases. This reversal rate is above the USPTO average, indicating that appeals have better success here than typical.

Strategic Value of Filing an Appeal

Total Appeal Filings
12
Allowed After Appeal Filing
5
(41.7%)
Not Allowed After Appeal Filing
7
(58.3%)
Filing Benefit Percentile
69.4%
Higher than average

Understanding Appeal Filing Strategy

Filing a Notice of Appeal can sometimes lead to allowance even before the appeal is fully briefed or decided by the PTAB. This occurs when the examiner or their supervisor reconsiders the rejection during the mandatory appeal conference (MPEP § 1207.01) after the appeal is filed.

In this dataset, 41.7% of applications that filed an appeal were subsequently allowed. This appeal filing benefit rate is above the USPTO average, suggesting that filing an appeal can be an effective strategy for prompting reconsideration.

Strategic Recommendations

Appeals to PTAB show good success rates. If you have a strong case on the merits, consider fully prosecuting the appeal to a Board decision.

Filing a Notice of Appeal is strategically valuable. The act of filing often prompts favorable reconsideration during the mandatory appeal conference.

Examiner CHANG, DANIEL D - Prosecution Strategy Guide

Executive Summary

Examiner CHANG, DANIEL D works in Art Unit 2844 and has examined 1,050 patent applications in our dataset. With an allowance rate of 94.1%, this examiner allows applications at a higher rate than most examiners at the USPTO. Applications typically reach final disposition in approximately 16 months.

Allowance Patterns

Examiner CHANG, DANIEL D's allowance rate of 94.1% places them in the 82% percentile among all USPTO examiners. This examiner is more likely to allow applications than most examiners at the USPTO.

Office Action Patterns

On average, applications examined by CHANG, DANIEL D receive 1.04 office actions before reaching final disposition. This places the examiner in the 10% percentile for office actions issued. This examiner issues significantly fewer office actions than most examiners.

Prosecution Timeline

The median time to disposition (half-life) for applications examined by CHANG, DANIEL D is 16 months. This places the examiner in the 98% percentile for prosecution speed. Applications move through prosecution relatively quickly with this examiner.

Interview Effectiveness

Conducting an examiner interview provides a -0.8% benefit to allowance rate for applications examined by CHANG, DANIEL D. This interview benefit is in the 11% percentile among all examiners. Note: Interviews show limited statistical benefit with this examiner compared to others, though they may still be valuable for clarifying issues.

Request for Continued Examination (RCE) Effectiveness

When applicants file an RCE with this examiner, 38.6% of applications are subsequently allowed. This success rate is in the 88% percentile among all examiners. Strategic Insight: RCEs are highly effective with this examiner compared to others. If you receive a final rejection, filing an RCE with substantive amendments or arguments has a strong likelihood of success.

After-Final Amendment Practice

This examiner enters after-final amendments leading to allowance in 72.6% of cases where such amendments are filed. This entry rate is in the 93% percentile among all examiners. Strategic Recommendation: This examiner is highly receptive to after-final amendments compared to other examiners. Per MPEP § 714.12, after-final amendments may be entered "under justifiable circumstances." Consider filing after-final amendments with a clear showing of allowability rather than immediately filing an RCE, as this examiner frequently enters such amendments.

Pre-Appeal Conference Effectiveness

When applicants request a pre-appeal conference (PAC) with this examiner, 33.3% result in withdrawal of the rejection or reopening of prosecution. This success rate is in the 33% percentile among all examiners. Note: Pre-appeal conferences show below-average success with this examiner. Consider whether your arguments are strong enough to warrant a PAC request.

Appeal Withdrawal and Reconsideration

This examiner withdraws rejections or reopens prosecution in 75.0% of appeals filed. This is in the 65% percentile among all examiners. Of these withdrawals, 44.4% occur early in the appeal process (after Notice of Appeal but before Appeal Brief). Strategic Insight: This examiner shows above-average willingness to reconsider rejections during appeals. The mandatory appeal conference (MPEP § 1207.01) provides an opportunity for reconsideration.

Petition Practice

When applicants file petitions regarding this examiner's actions, 45.0% are granted (fully or in part). This grant rate is in the 38% percentile among all examiners. Strategic Note: Petitions show below-average success regarding this examiner's actions. Ensure you have a strong procedural basis before filing.

Examiner Cooperation and Flexibility

Examiner's Amendments: This examiner makes examiner's amendments in 1.3% of allowed cases (in the 70% percentile). This examiner makes examiner's amendments more often than average to place applications in condition for allowance (MPEP § 1302.04).

Quayle Actions: This examiner issues Ex Parte Quayle actions in 12.3% of allowed cases (in the 90% percentile). Per MPEP § 714.14, a Quayle action indicates that all claims are allowable but formal matters remain. This examiner frequently uses Quayle actions compared to other examiners, which is a positive indicator that once substantive issues are resolved, allowance follows quickly.

Prosecution Strategy Recommendations

Based on the statistical analysis of this examiner's prosecution patterns, here are tailored strategic recommendations:

  • Consider after-final amendments: This examiner frequently enters after-final amendments. If you can clearly overcome rejections with claim amendments, file an after-final amendment before resorting to an RCE.
  • RCEs are effective: This examiner has a high allowance rate after RCE compared to others. If you receive a final rejection and have substantive amendments or arguments, an RCE is likely to be successful.

Relevant MPEP Sections for Prosecution Strategy

  • MPEP § 713.10: Examiner interviews - available before Notice of Allowance or transfer to PTAB
  • MPEP § 714.12: After-final amendments - may be entered "under justifiable circumstances"
  • MPEP § 1002.02(c): Petitionable matters to Technology Center Director
  • MPEP § 1004: Actions requiring primary examiner signature (allowances, final rejections, examiner's answers)
  • MPEP § 1207.01: Appeal conferences - mandatory for all appeals
  • MPEP § 1214.07: Reopening prosecution after appeal

Important Disclaimer

Not Legal Advice: The information provided in this report is for informational purposes only and does not constitute legal advice. You should consult with a qualified patent attorney or agent for advice specific to your situation.

No Guarantees: We do not provide any guarantees as to the accuracy, completeness, or timeliness of the statistics presented above. Patent prosecution statistics are derived from publicly available USPTO data and are subject to data quality limitations, processing errors, and changes in USPTO practices over time.

Limitation of Liability: Under no circumstances will IronCrow AI be liable for any outcome, decision, or action resulting from your reliance on the statistics, analysis, or recommendations presented in this report. Past prosecution patterns do not guarantee future results.

Use at Your Own Risk: While we strive to provide accurate and useful prosecution statistics, you should independently verify any information that is material to your prosecution strategy and use your professional judgment in all patent prosecution matters.