Examiner Hai Huynh
Grant ratio: 89.8% (95th percentile in Art Unit 3747 among examiners with at least 20 applications). Average office actions per grant: 1.17. Most common rejection type: §102.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 74801
- Primary art unit
- 3747
- Work group
- 3740
- Technology center
- 3700
- Applications
- 1,261
- Granted applications
- 1,133
- Examiner phone
- (571) 272-4844
- Supervisor
- Lindsay M Low
- Supervisor phone
- (571) 272-1196
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 54 | 72.3% | 1.66 |
| Group | 444 | 57.6% | 1.86 |
| Tech Center | 2,671 | 48.4% | 2.01 |
| 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 | 1,076 | 85.3% |
| 2 OAs | 167 | 13.2% |
| 3 OAs | 13 | 1.0% |
| 4 OAs | 5 | 0.4% |
| 5+ OAs | 0 | 0.0% |
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 |
|---|---|---|---|
| 2008 | 83 | 73 | 88.0% |
| 2009 | 95 | 86 | 90.5% |
| 2010 | 75 | 69 | 92.0% |
| 2011 | 81 | 76 | 93.8% |
| 2012 | 93 | 89 | 95.7% |
| 2013 | 78 | 73 | 93.6% |
| 2014 | 59 | 55 | 93.2% |
| 2015 | 64 | 59 | 92.2% |
| 2016 | 81 | 75 | 92.6% |
| 2017 | 69 | 66 | 95.7% |
| 2018 | 70 | 62 | 88.6% |
| 2019 | 60 | 57 | 95.0% |
| 2020 | 48 | 43 | 89.6% |
| 2021 | 44 | 42 | 95.5% |
| 2022 | 59 | 59 | 100.0% |
| 2023 | 49 | 49 | 100.0% |
| 2024 | 59 | 57 | 96.6% |
| 2025 | 63 | 43 | 68.3% |
| 2026 | 31 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 1,261 | 2.6% | 55.1% | 16.3% | 0.3% |
| Action 2 | 185 | 2.7% | 36.2% | 25.9% | 1.6% |
| Action 3 | 18 | 0.0% | 50.0% | 33.3% | 5.6% |
| Action 4 | 5 | 0.0% | 40.0% | 60.0% | 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%
1.0%
0.0%
0.0%
2014: Alice
0.0%
0.0%
16.8%
8.5%
2.6%
2019: PEG
1.6%
0.0%
0.0%
4.7%
2.0%
2024: AI examples
1.6%
2025: August memo
1.4%
15.6%
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.