Examiner Kenneth Tsang
Grant ratio: 60.0% (14th percentile in Art Unit 2137 among examiners with at least 20 applications). Average office actions per grant: 2.83. Most common rejection type: §103.
Appears inactive
Last office action in data: January 2017
Examiner record
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 24 | 68.6% | 1.90 |
| Group | 138 | 68.4% | 2.08 |
| Tech Center | 1,807 | 51.8% | 2.19 |
| USPTO | 16,572 | 52.1% | 1.98 |
Office actions per application
| Office actions | Applications | Share of applications |
|---|---|---|
| No OA observed | 0 | 0.0% |
| 1 OA | 8 | 16.0% |
| 2 OAs | 20 | 40.0% |
| 3 OAs | 11 | 22.0% |
| 4 OAs | 6 | 12.0% |
| 5+ OAs | 5 | 10.0% |
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 |
|---|---|---|---|
| 2012 | 1 | 0 | 0.0% |
| 2013 | 7 | 6 | 85.7% |
| 2014 | 20 | 11 | 55.0% |
| 2015 | 14 | 8 | 57.1% |
| 2016 | 7 | 5 | 71.4% |
| 2017 | 1 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 50 | 2.0% | 0.0% | 78.0% | 0.0% |
| Action 2 | 42 | 4.8% | 0.0% | 81.0% | 0.0% |
| Action 3 | 22 | 0.0% | 0.0% | 86.4% | 0.0% |
| Action 4 | 11 | 0.0% | 0.0% | 90.9% | 0.0% |
| Action 5 | 5 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 6 | 3 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 7 | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
Section 101 rejections
Last 3 years: 2023-10-02–2026-10-02. All years includes every dated office action in the data.
By year
0.0%
4.3%
2014: Alice
0.0%
0.0%
11.1%
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 Oct. 9, 2026.