Westman Champlin & Koehler, P.A.
Patent reexamination counsel·6 ex parte reexams
Westman Champlin & Koehler, P.A. has served as patent-owner counsel in 6 USPTO ex parte reexaminations, with 5 currently open. The firm most often represents Stratasys Inc., Clark Equipment Company, and Focusrite Audio Engineering Limited. ExamPat indexes the full prosecution record for each proceeding, including office-action grounds, certificate outcomes, and downstream PTAB and Federal Circuit decisions.
Filings by year
Top patent owners represented
Outcome track record
How this firm's reexams resolve once a certificate issues: all claims confirmed, amended, mixed, or canceled.
- Certificate outcome split across every bucket
- Share of proceedings where claims survived
Practice metrics
Certificate rate, average pendency, and the open/closed split across the firm's full reexam docket.
- Certificate rate of closed proceedings
- Average pendency in months
Examiners & adversaries
Which examiners most often decide this firm's reexams, and which requesters most often challenge its patents.
- Most frequent examiners
- Top opposing requesters
Recent reexaminations (6)
| Control # | Filed | Patent | Title | Owner | Status |
|---|---|---|---|---|---|
| 90/016,548 | Aug 27, 2026 | — | METHOD FOR BUILDING THREE-DIMENSIONAL OBJECTS WITH EXTRUSION-BASED LAYERED DEPOSITION SYSTEMS | — | Open |
| 90/016,400 | Jun 17, 2026 | 7,555,357 | METHOD FOR BUILDING THREE-DIMENSIONAL OBJECTS WITH EXTRUSION-BASED LAYERED DEPOSITION SYSTEMS | Stratasys Inc. | Open |
| 90/016,323 | May 20, 2026 | 8,747,097 | NETWORKED THREE-DIMENSIONAL PRINTER WITH THREE-DIMENSIONAL SCANNER | Stratasys Inc. | Open |
| 90/016,285 | May 14, 2026 | 11,167,464 | TAGGED BUILD MATERIAL FOR THREE-DIMENSIONAL PRINTING | Stratasys Inc. | Open |
| 90/016,003 | Feb 26, 2026 | 10,934,684 | CONTROL SYSTEM FOR POWER MACHINE | Clark Equipment Company | Open |
| 90/013,583 | Sep 8, 2015 | D642,160 | AUDIO APPARATUS | Focusrite Audio Engineering Limited | Closed |
Other reexam law firms
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- Sterne, Kessler, Goldstein & Fox P.L.L.C.105 reexams · 34 pending
- Fish & Richardson, P.C.76 reexams · 17 pending
- Volpe Koenig54 reexams · 29 pending
- Lowenstein & Weatherwax, LLP51 reexams · 24 pending
- Nixon & Vanderhye, P.C.48 reexams · 8 pending
See the full reexam picture for Westman Champlin & Koehler, P.A.
Certificate outcomes, pendency, and the parties and examiners behind these cases. Free to sign up.