Examiner Warren K. Fenwick
Grant ratio: 85.1% (65th percentile in Art Unit 2852 among examiners with at least 20 applications). Average office actions per grant: 1.28. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 83517
- Primary art unit
- 2852
- Work group
- 2850
- Technology center
- 2800
- Applications
- 659
- Granted applications
- 561
- Examiner phone
- (571) 270-3040
- Supervisor
- Clayton E. Laballe
- Supervisor phone
- (571) 272-1594
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 59 | 80.7% | 1.48 |
| Group | 380 | 61.0% | 1.65 |
| Tech Center | 2,413 | 62.4% | 1.69 |
| 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 | 532 | 80.7% |
| 2 OAs | 90 | 13.7% |
| 3 OAs | 27 | 4.1% |
| 4 OAs | 7 | 1.1% |
| 5+ OAs | 3 | 0.5% |
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 |
|---|---|---|---|
| 2008 | 26 | 21 | 80.8% |
| 2009 | 37 | 27 | 73.0% |
| 2010 | 32 | 29 | 90.6% |
| 2011 | 44 | 40 | 90.9% |
| 2012 | 38 | 38 | 100.0% |
| 2013 | 36 | 32 | 88.9% |
| 2014 | 34 | 33 | 97.1% |
| 2015 | 38 | 36 | 94.7% |
| 2016 | 39 | 38 | 97.4% |
| 2017 | 33 | 28 | 84.8% |
| 2018 | 28 | 26 | 92.9% |
| 2019 | 41 | 38 | 92.7% |
| 2020 | 36 | 34 | 94.4% |
| 2021 | 33 | 28 | 84.8% |
| 2022 | 29 | 25 | 86.2% |
| 2023 | 36 | 34 | 94.4% |
| 2024 | 43 | 38 | 88.4% |
| 2025 | 34 | 16 | 47.1% |
| 2026 | 22 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 659 | 1.5% | 29.3% | 43.7% | 8.6% |
| Action 2 | 127 | 1.6% | 15.7% | 69.3% | 1.6% |
| Action 3 | 37 | 0.0% | 21.6% | 75.7% | 0.0% |
| Action 4 | 10 | 0.0% | 10.0% | 70.0% | 0.0% |
| Action 5 | 3 | 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
5.9%
0.0%
0.0%
0.0%
4.3%
2.0%
2014: Alice
1.8%
0.0%
0.0%
0.0%
0.0%
2019: PEG
0.0%
0.0%
2.9%
3.3%
0.0%
2024: AI examples
2.0%
2025: August memo
5.1%
4.3%
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.