Prosecution Insights
Last updated: October 25, 2026

USPTO Art Unit 2849: Examiners and Allowance Rates

26 examiners • 9 with pending office actions • Semiconductors, Circuits & Optics (Tech Center 2800)

Art unit baseline (last 5 years, 4,985 dispositions): 91% allowance rate • 4.2 office actions per allowance • 822 days median pendency
ExaminerAllowance rateResolved casesPending apps
Duc M Pham100.0%7717
Esayas G Yeshaw100.0%748
Joel Barnett100.0%5018
Kareem Fuad Alhwamdeh100.0%10
Daniel D Chang100.0%10
Volvick Derose100.0%10
Pinping Sun100.0%10
Hai L Nguyen100.0%10
Aqeel H Bukhari98.9%9312
Michael J Warmflash97.4%396
Cassandra F Cox97.0%2300
William Hernandez96.5%3407
Arnold M Kinkead94.6%5150
Diana Cheng94.2%3260
Joseph Chang93.8%41610
Jeffrey M Shin93.4%3640
Richard Tan91.9%38214
Jeffery Shawn Zweizig91.9%2210
Levi Gannon90.3%5560
Ryan Johnson89.9%4440
Daniel Calrissian Puentes89.7%2520
Thomas J Hiltunen89.0%4630
Khareem E Almo88.6%25414
David D Mattison87.1%1320
Colleen J O Toole83.5%2540
Menatoallah M Youssef81.0%210

Frequently Asked Questions

What is the allowance rate in USPTO Art Unit 2849?

90.7% over the last five years, across 4,985 resolved applications.

Which examiners in Art Unit 2849 have the highest allowance rates?

Among examiners with at least 30 resolved applications: Duc M Pham (100.0%, 77 resolved), Esayas G Yeshaw (100.0%, 74 resolved), Joel Barnett (100.0%, 50 resolved).

Which examiners in Art Unit 2849 have the lowest allowance rates?

Among examiners with at least 30 resolved applications: Colleen J O Toole (83.5%, 254 resolved), David D Mattison (87.1%, 132 resolved), Khareem E Almo (88.6%, 254 resolved).

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