Examiner Ka Shan Choy
Grant ratio: 83.5% (68th percentile in Art Unit 2435 among examiners with at least 20 applications). Average office actions per grant: 1.42. Most common rejection type: §103.
Recently active
Last office action in data: July 2026
Examiner record
- Examiner ID
- 93851
- Primary art unit
- 2435
- Work group
- 2430
- Technology center
- 2400
- Applications
- 284
- Granted applications
- 237
- Examiner phone
- (571) 272-1569
- Supervisor
- Amir Mehrmanesh
- Supervisor phone
- (571) 270-3351
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 23 | 65.2% | 1.67 |
| Group | 233 | 61.7% | 1.99 |
| Tech Center | 1,754 | 58.4% | 2.14 |
| USPTO | 16,475 | 52.7% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 1 | 0.4% |
| 1 OA | 205 | 72.2% |
| 2 OAs | 50 | 17.6% |
| 3 OAs | 19 | 6.7% |
| 4 OAs | 6 | 2.1% |
| 5+ OAs | 3 | 1.1% |
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 |
|---|---|---|---|
| 2018 | 12 | 11 | 91.7% |
| 2019 | 36 | 33 | 91.7% |
| 2020 | 33 | 32 | 97.0% |
| 2021 | 37 | 35 | 94.6% |
| 2022 | 36 | 33 | 91.7% |
| 2023 | 43 | 41 | 95.3% |
| 2024 | 45 | 42 | 93.3% |
| 2025 | 25 | 10 | 40.0% |
| 2026 | 17 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 283 | 5.7% | 4.9% | 62.5% | 17.0% |
| Action 2 | 78 | 2.6% | 0.0% | 87.2% | 6.4% |
| Action 3 | 28 | 0.0% | 0.0% | 92.9% | 7.1% |
| Action 4 | 9 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 5 | 3 | 0.0% | 33.3% | 66.7% | 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%
2019: PEG
0.0%
0.0%
2.1%
11.4%
7.1%
2024: AI examples
7.8%
2025: August memo
9.4%
5.0%
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.