Examiner Stamford Hwang
Grant ratio: 12.5% (18th percentile in Art Unit 2641 among examiners with at least 20 applications). Average office actions per grant: 1.60. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 74489
- Primary art unit
- 2641
- Work group
- 2640
- Technology center
- 2600
- Applications
- 40
- Granted applications
- 5
- Examiner phone
- (571) 272-7904
- Supervisor
- Charles Appiah
- Supervisor phone
- (571) 272-7904
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 24 | 51.7% | 2.19 |
| Group | 226 | 57.7% | 2.06 |
| Tech Center | 1,754 | 57.4% | 1.88 |
| USPTO | 16,475 | 52.7% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 9 | 22.5% |
| 1 OA | 15 | 37.5% |
| 2 OAs | 8 | 20.0% |
| 3 OAs | 3 | 7.5% |
| 4 OAs | 4 | 10.0% |
| 5+ OAs | 1 | 2.5% |
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 |
|---|---|---|---|
| 2010 | 2 | 1 | 50.0% |
| 2011 | 9 | 1 | 11.1% |
| 2012 | 1 | 1 | 100.0% |
| 2014 | 1 | 0 | 0.0% |
| 2017 | 1 | 0 | 0.0% |
| 2020 | 2 | 0 | 0.0% |
| 2021 | 3 | 0 | 0.0% |
| 2025 | 8 | 2 | 25.0% |
| 2026 | 13 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 31 | 0.0% | 12.9% | 80.6% | 6.5% |
| Action 2 | 16 | 0.0% | 6.3% | 87.5% | 6.3% |
| Action 3 | 8 | 0.0% | 0.0% | 87.5% | 12.5% |
| Action 4 | 5 | 0.0% | 20.0% | 80.0% | 0.0% |
| Action 5 | 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%
0.0%
0.0%
0.0%
2014: Alice
0.0%
0.0%
0.0%
0.0%
0.0%
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.