Patent 9423424
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
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Proceedings on file (0)
All PTAB activity →AIA trial proceedings (IPR / PGR / CBM) filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced from the USPTO Open Data Portal and refreshed every six hours; each proceeding number deep-links to the PTAB E2E docket.
Current assignee: MPI Corp
No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Proceedings overview
There are no PTAB (Patent Trial and Appeal Board) proceedings on file for US Patent 9,423,424. This indicates that the patent has not been challenged through Inter Partes Review (IPR), Post-Grant Review (PGR), or Covered Business Method (CBM) review. For a defendant, this means the patent's claims are currently untested by the PTAB.
Strategic summary
As of today, May 31, 2026, all claims of US Patent 9,423,424 remain untested by the PTAB. This means that if a defendant is being asserted against, all prior-art grounds are still potentially available for an IPR or other validity challenge. There is no estoppel landscape to consider from previous PTAB trials. The absence of PTAB activity could suggest several things: either the patent has not been extensively asserted, or previous assertions have been resolved without the need for PTAB challenges, or potential challengers have not identified strong prior art for an AIA trial.
Recommended next steps
If facing an assertion of US Patent 9,423,424, a defendant would need to conduct a thorough prior art search to assess the patent's validity. If strong prior art is found, an Inter Partes Review petition could be a viable defensive strategy, as no PTAB activity currently exists for this patent.
Generated 5/31/2026, 6:47:05 AM