Examiner Examiner Tuan Dao, Whose Telephone/Fax Numbers Are (571) 270 3387 And (571) 270 4387, Respectively. The Examiner Can Normally Be Reached On Every Monday-Thursday, And The Second Friday Of The Bi-Week From 7:30Am To 5:00Pm. If Attempts To Reach The Examiner By Telephone Are Unsuccessful, The Examiner’S Supervisor, Chat Do, Can Be Reached At (571) 272 3721. The Fax Phone Number For The Organization Where This Application Or Proceeding Is Assigned Is (571) 273 8300. Any Inquiry Of A General Nature Of Relating To The Status Of This Application Or Proceeding Should Be Directed To The Tc 2100 Group Receptionist
Examiner Examiner Tuan Dao, Whose Telephone/Fax Numbers Are (571) 270 3387 And (571) 270 4387, Respectively. The Examiner Can Normally Be Reached On Every Monday-Thursday, And The Second Friday Of The Bi-Week From 7:30Am To 5:00Pm. If Attempts To Reach The Examiner By Telephone Are Unsuccessful, The Examiner’S Supervisor, Chat Do, Can Be Reached At (571) 272 3721. The Fax Phone Number For The Organization Where This Application Or Proceeding Is Assigned Is (571) 273 8300. Any Inquiry Of A General Nature Of Relating To The Status Of This Application Or Proceeding Should Be Directed To The Tc 2100 Group Receptionist appears to be about average relative to their peer examiners. Their lifetime grant ratio is 77.4%, they average 2.01 office actions per granted patent, and their rejection profile is dominated by §103 and occasional §101 rejections.
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Examiner Details
- Observed Examiner Years
- 18 years (2009-2026)
- Phone
- (571) 272-2100
- Predicted Supervisor
- N/A
- Supervisor Phone
- N/A
- Tech Center
- 2100 - Computer Architecture Software and Information Security
- Group
- 2190 - Inter-process Communications and Software Development
Metrics
- Applications Evaluated
- 819
- Granted Applications
- 634
- Non-Granted Applications
- 185
- Avg OA / Grant
- 2.01
- Last OA Observed
- March 2026 (0 months ago)
- Work Groups Seen
Context Comparison
| Scope | Examiners | Lifetime Grant Ratio | Avg OA / Grant |
|---|---|---|---|
| This Examiner | 1 | 77.4% | 2.01 |
| Art Unit | 35 | 57.8% | 1.86 |
| Group | 221 | 57.3% | 2.03 |
| Tech Center | 1,706 | 55.9% | 2.19 |
| USPTO | 16,116 | 54.8% | 1.98 |
Grant Timeline
| Year | Applications | Granted | Grant Rate |
|---|---|---|---|
| No observed data before 2009; examiner may not yet have been active in the available dataset. | |||
| 2009 | 17 | 10 | 58.8% |
| 2010 | 38 | 24 | 63.2% |
| 2011 | 43 | 31 | 72.1% |
| 2012 | 46 | 38 | 82.6% |
| 2013 | 61 | 46 | 75.4% |
| 2014 | 55 | 44 | 80.0% |
| 2015 | 54 | 45 | 83.3% |
| 2016 | 52 | 43 | 82.7% |
| 2017 | 63 | 53 | 84.1% |
| 2018 | 52 | 40 | 76.9% |
| 2019 | 51 | 47 | 92.2% |
| 2020 | 41 | 39 | 95.1% |
| 2021 | 42 | 40 | 95.2% |
| 2022 | 42 | 41 | 97.6% |
| 2023 | 44 | 41 | 93.2% |
| 2024 | 40 | 32 | 80.0% |
| 2025 | 58 | 20 | 34.5% |
| 2026 | 20 | 0 | 0.0% |
634 family-cache-validated grants; 0 OA-only grant signals.
Rejection Timeline
| OA # | Office Actions | § 101 Percentage | § 102 Percentage | § 103 Percentage | § 112 Percentage |
|---|---|---|---|---|---|
| 1 | 818 | 5.5% | 4.6% | 86.9% | 0.2% |
| 2 | 445 | 4.0% | 3.6% | 89.9% | 0.4% |
| 3 | 208 | 2.9% | 2.9% | 89.9% | 1.4% |
| 4 | 109 | 4.6% | 3.7% | 88.1% | 0.9% |
| 5 | 41 | 4.9% | 4.9% | 85.4% | 4.9% |
| 6 | 17 | 0.0% | 0.0% | 94.1% | 5.9% |
| 7 | 9 | 0.0% | 0.0% | 88.9% | 11.1% |
| 8 | 3 | 0.0% | 0.0% | 100.0% | 0.0% |
§ 101 Yearly Trend
Each bar shows the share of this examiner's observed office actions in that year that included a § 101 rejection.