Examiner Tu-Tu Ho
Grant ratio: 89.7% (95th percentile in Art Unit 2818 among examiners with at least 20 applications). Average office actions per grant: 1.23. Most common rejection type: §103.
Recently active
Last office action in data: August 2026
Examiner record
- Examiner ID
- 78824
- Primary art unit
- 2818
- Work group
- 2810
- Technology center
- 2800
- Applications
- 1,388
- Granted applications
- 1,245
- Examiner phone
- (571) 272-1778
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| Group | Examiners | Average grant ratio | Average office actions / grant |
|---|---|---|---|
| Art Unit | 48 | 48.7% | 1.60 |
| Group | 305 | 54.6% | 1.79 |
| 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 | 1 | 0.1% |
| 1 OA | 1,138 | 82.0% |
| 2 OAs | 208 | 15.0% |
| 3 OAs | 28 | 2.0% |
| 4 OAs | 8 | 0.6% |
| 5+ OAs | 5 | 0.4% |
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 | 70 | 54 | 77.1% |
| 2009 | 87 | 70 | 80.5% |
| 2010 | 103 | 94 | 91.3% |
| 2011 | 83 | 75 | 90.4% |
| 2012 | 76 | 73 | 96.1% |
| 2013 | 76 | 74 | 97.4% |
| 2014 | 78 | 72 | 92.3% |
| 2015 | 72 | 68 | 94.4% |
| 2016 | 79 | 76 | 96.2% |
| 2017 | 78 | 73 | 93.6% |
| 2018 | 67 | 65 | 97.0% |
| 2019 | 76 | 75 | 98.7% |
| 2020 | 72 | 71 | 98.6% |
| 2021 | 62 | 60 | 96.8% |
| 2022 | 66 | 65 | 98.5% |
| 2023 | 84 | 83 | 98.8% |
| 2024 | 59 | 59 | 100.0% |
| 2025 | 62 | 38 | 61.3% |
| 2026 | 38 | 0 | 0.0% |
Rejections by office-action stage
| Office-action stage | Actions observed | §101 | §102 | §103 | §112 |
|---|---|---|---|---|---|
| Action 1 | 1,387 | 0.5% | 32.0% | 62.8% | 0.3% |
| Action 2 | 249 | 0.0% | 24.5% | 69.1% | 0.0% |
| Action 3 | 41 | 0.0% | 26.8% | 70.7% | 0.0% |
| Action 4 | 13 | 0.0% | 30.8% | 69.2% | 0.0% |
| Action 5 | 5 | 0.0% | 20.0% | 80.0% | 0.0% |
| Action 6 | 2 | 0.0% | 0.0% | 100.0% | 0.0% |
| Action 7 | 2 | 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%
1.0%
2.1%
2014: Alice
0.0%
0.0%
1.1%
0.0%
0.0%
2019: PEG
0.0%
0.0%
0.0%
0.0%
2.2%
2024: AI examples
1.5%
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.