Walmart Inc.
Ex parte reexamination requester·3 ex parte reexams
Walmart Inc. has requested 3 USPTO ex parte reexaminations, with 3 currently open. It most often challenges patents owned by Headwater Research LLC and Headwater Management LLC. 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 |
|---|---|---|---|---|---|
| 90/016,284 | May 14, 2026 | 9,198,117 | Network System With Common Secure Wireless Message Service Serving Multiple Applications on Multiple Wireless Devices | Headwater Research LLC | Open |
| 90/016,185 | Apr 15, 2026 | 10,321,320 | Wirless Network Buffered Message System | Headwater Management LLC | Open |
| 90/015,831 | Dec 24, 2025 | 9,615,192 | MESSAGE LINK SERVER WITH PLURAL MESSAGE DELIVERY TRIGGERS | Headwater Research LLC | Open |
See the full reexam picture for Walmart Inc.
Certificate outcomes, pendency, and the parties and examiners behind these cases. Free to sign up.