ExamPat

Woo H Choi

USPTO Patent Examiner·Active 2012 to 2026

Woo H Choi is a USPTO patent examiner who has handled 52 ex parte reexaminations between 2012 and 2026, with 23 currently open. These reexams concentrate in Electrical & Electronic, Physics & Instruments, and Mechanical Engineering. ExamPat indexes the full prosecution record for each of these cases, including office-action grounds, certificate outcomes, and downstream PTAB and federal-circuit decisions.

Filings by year

5
12
1
17
1
18
3
20
5
21
3
22
4
23
7
24
13
25
12
26

Technology mix

Electrical & Electronic27 (50%)
Physics & Instruments21 (39%)
Mechanical Engineering3 (6%)
Mechanical & Manufacturing2 (4%)
Life Sciences & Consumer1 (2%)

Compare against all examiners

Eight side-by-side metrics: case volume, pendency, OAs per reexam, rejection mix, SNQ denial rate, certification rate, and PTAB appeal rate, with a Δ column showing where this examiner runs higher or lower than the corpus.

  • Average and median pendency, both for this examiner and the corpus
  • Rejection basis split (102 / 103 / 112) head-to-head
  • Certification, SNQ denial, and PTAB appeal rates

Certificate outcome distribution

How this examiner's certificates split across the six possible outcomes: all claims confirmed, confirmed with amendment, confirmed with new claims, mixed, or all claims canceled. Includes share comparison to the corpus distribution.

  • Count and share for each of the six outcome buckets
  • Δ vs. corpus distribution in percentage points
  • Useful for setting realistic patent-owner expectations

Event-to-event timing

Median time for this examiner's cases at each prosecution stage, from filing to first office action, filing to NIRC, and filing to certificate, with corpus comparison and sample size.

  • Median in months per transition
  • Side-by-side with the corpus median
  • n column showing how many of this examiner's cases completed each transition

vs. all examiners

Certificate outcome distribution

Event-to-event timing (median)

Recent reexaminations (showing 25 of 52)

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Control #FiledPatentTitlePendencyStatus
90/016,393Jun 12, 202610,707,851DOUBLE DATA RATE CIRCUIT AND DATA GENERATION METHOD IMPLEMENTING PRECISE DUTY CYCLE CONTROL—Open
90/016,368Jun 1, 202611,988,839AUGMENTED REALITY APPARATUS AND OPTICAL SYSTEM THEREFOR—Open
90/016,343May 27, 20268,643,189PACKAGED SEMICONDUCTOR DIE WITH POWER RAIL PADS—Open
90/016,285May 14, 202611,167,464TAGGED BUILD MATERIAL FOR THREE-DIMENSIONAL PRINTING—Open
90/020,167Apr 23, 20268,860,436SENSOR OF ELECTROMAGNETIC INDUCTION TYPE COORDINATE INPUT DEVICE—Open
90/016,203Apr 21, 20268,593,580PROJECTION-TYPE DISPLAY APPARATUS—Open
90/016,110Apr 1, 202610,349,474LAMP TUBE CAPABLE OF RECTIFYING AND STABILIZING VOLTAGES—Open
90/016,087Mar 24, 20268,183,887HIGH SPEED SIGNALING SYSTEM WITH ADAPTIVE TRANSMIT PRE-EMPHASIS—Open
90/016,009Feb 26, 202610,917,272NON-TRANSITORY COMPUTER-READABLE INFORMATION STORAGE MEDIA FOR VARIABLE HEADER REPETITION IN A WIRELESS OFDM NETWORK—Open
90/015,984Feb 23, 20268,810,458HANDHELD DEVICE WITH TWO ANTENNAS, AND METHOD OF ENHANCING THE ISOLATION BETWEEN THE ANTENNAS—Closed
90/015,902Jan 23, 20269,685,351Wire Bond Mold Lock Method and Structure—Open
90/015,860Jan 5, 20269,685,351Wire Bond Mold Lock Method and Structure—Open
90/015,768Dec 10, 20258,562,200LIGHTING MODULE, BACKLIGHT UNIT, AND DISPLAY DEVICE INCLUDING THE SAME—Closed
90/015,746Dec 2, 202510,601,780INTERNET ISOLATION FOR AVOIDING INTERNET SECURITY THREATS—Open
90/015,730Nov 26, 20258,314,572APPARATUS AND METHODOLOGY FOR ENHANCING EFFICIENCY OF A POWER DISTRIBUTION SYSTEM HAVING POWER FACTOR CORRECTION CAPABILITY BY USING A SELF-CALIBRATING CONTROLLER—Open
90/015,638Oct 28, 202510,567,047WIRELESS COMMUNICATION METHOD AND WIRELESS COMMUNICATION TERMINAL FOR SIGNALING MULTI-USER PACKET—Open
90/015,596Oct 15, 20259,460,037FLEXIBLE MOBILE DEVICE CONNECTIVITY TO AUTOMOTIVE SYSTEMS WITH USB HUBS—Open
90/015,597Oct 10, 202510,545,899FLEXIBLE MOBILE DEVICE CONNECTIVITY TO AUTOMOTIVE SYSTEMS WITH USB HUBS—Open
90/015,525Sep 19, 202510,613,306LIGHT DISTRIBUTION SYSTEM EMPLOYING PLANAR MICROSTRUCTURED WAVEGUIDE—Closed
90/015,458Aug 18, 20256,944,262DENTAL AND ORTHOPEDIC DENSITOMETRY MODELING SYSTEM AND METHOD—Open
90/015,349Jun 27, 2025RE48,675OPTICAL FIBER INTERCONNECT CABINETS, TERMINATION MODULES AND FIBER CONNECTIVITY MANAGEMENT FOR THE SAME—Open
90/015,348Jun 27, 2025RE44,758OPTICAL FIBER INTERCONNECT CABINETS, TERMINATION MODULES AND FIBER CONNECTIVITY MANAGEMENT FOR THE SAME—Open
90/019,976May 30, 20258,181,042LOW POWER MODE DATA PRESERVATION IN SECURE ICS10 moClosed
90/019,919Apr 18, 20259,930,158VEHICLE IMMERSIVE COMMUNICATION SYSTEM—Open
90/019,848Feb 11, 202511,424,792Coordinated Multipoint Systems11 moClosed

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