Examiner Po-Chih Chen
Grant ratio: 66.1% (48th percentile in Art Unit 1626 among examiners with at least 20 applications). Average office actions per grant: 1.98. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 88629
- Primary art unit
- 1626
- Work group
- 1620
- Technology center
- 1600
- Applications
- 830
- Granted applications
- 549
- Examiner phone
- (571) 270-7243
- Supervisor
- Clinton Brooks
- Supervisor phone
- (571) 270-7682
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 31 | 56.4% | 1.65 |
| Group | 252 | 46.0% | 1.76 |
| Tech Center | 1,373 | 38.0% | 2.02 |
| USPTO | 16,475 | 52.7% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 0 | 0.0% |
| 1 OA | 398 | 47.9% |
| 2 OAs | 265 | 31.9% |
| 3 OAs | 75 | 9.0% |
| 4 OAs | 47 | 5.7% |
| 5+ OAs | 46 | 5.5% |
Each application is counted once. “5+” includes all higher counts.
Grant history
Recent ratios may be lower while applications remain pending.
Yearly counts
| Year | Applications | Grants | Grant rate |
|---|---|---|---|
| 2012 | 15 | 12 | 80.0% |
| 2013 | 43 | 31 | 72.1% |
| 2014 | 44 | 36 | 81.8% |
| 2015 | 57 | 47 | 82.5% |
| 2016 | 60 | 53 | 88.3% |
| 2017 | 62 | 44 | 71.0% |
| 2018 | 57 | 37 | 64.9% |
| 2019 | 78 | 65 | 83.3% |
| 2020 | 47 | 31 | 66.0% |
| 2021 | 57 | 45 | 78.9% |
| 2022 | 65 | 47 | 72.3% |
| 2023 | 47 | 33 | 70.2% |
| 2024 | 67 | 46 | 68.7% |
| 2025 | 65 | 22 | 33.8% |
| 2026 | 66 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 831 | 1.0% | 15.5% | 61.1% | 19.0% |
| Action 2 | 433 | 0.2% | 12.7% | 60.0% | 20.6% |
| Action 3 | 168 | 0.0% | 15.5% | 60.1% | 22.0% |
| Action 4 | 93 | 0.0% | 14.0% | 60.2% | 16.1% |
| Action 5 | 46 | 0.0% | 15.2% | 54.3% | 23.9% |
| Action 6 | 25 | 0.0% | 12.0% | 68.0% | 12.0% |
| Action 7 | 15 | 0.0% | 6.7% | 73.3% | 6.7% |
| Action 8 | 6 | 0.0% | 33.3% | 66.7% | 16.7% |
| Action 9 | 3 | 0.0% | 0.0% | 66.7% | 33.3% |
| Action 10 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
Section 101 rejections
Last 3 years: 2023-08-28–2026-08-28. All years includes every dated office action in the data.
By year
0.0%
0.0%
1.1%
2014: Alice
0.0%
0.0%
2.2%
0.9%
0.0%
2019: PEG
0.0%
0.9%
0.0%
0.7%
0.8%
2024: AI examples
1.7%
2025: August memo
0.0%
0.0%
Each bar is the percentage of office actions with a §101 rejection.
PTAB appeals
No PTAB decisions could be matched to this examiner.
Older and transferred applications may not have a reliable examiner match. Data through Aug. 27, 2026.