AT&T Services Inc.
Ex parte reexamination requester·3 ex parte reexams
AT&T Services Inc. has requested 3 USPTO ex parte reexaminations, with 2 currently open. It most often challenges patents owned by Jerry D. Burchfiel, Cornell Research Foundation, Inc., and Innovative Sonic 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 challenged
Outcome track record
How this requester's challenges resolve: claims confirmed, amended, mixed, or fully canceled.
- Certificate outcome split across every bucket
- Share of challenges that canceled claims
Challenge metrics
Cancellation rate, average pendency, and the open/closed split across every reexam this requester has filed.
- Outcome rate of closed challenges
- Average pendency in months
Examiners & defense counsel
Which examiners decide this requester's challenges, and which firms defend the targeted patents.
- Most frequent examiners
- Top opposing counsel
Recent reexaminations (3)
| Control # | Filed | Patent | Title | Owner | Status |
|---|---|---|---|---|---|
| 90/015,966 | Feb 17, 2026 | RE47,720 | SPECTRUM-ADAPTIVE NETWORKING | Jerry D. Burchfiel | Open |
| 90/015,585 | Oct 7, 2025 | 7,839,775 | METHODS AND SYSTEMS FOR CHANNEL SENSING MULTIPLE ACCESS COMMUNICATIONS WITH MULTIPACKET RECEPTION | Cornell Research Foundation, Inc. | Open |
| 90/019,986 | Jun 4, 2025 | 9,237,489 | METHOD AND APPARATUS FOR SECONDARY CELL RELEASE DURING HANDOVER IN A WIRELESS COMMUNICATION SYSTEM | Innovative Sonic Limited | Closed |
See the full reexam picture for AT&T Services Inc.
Certificate outcomes, pendency, and the parties and examiners behind these cases. Free to sign up.