Today's post will be the final one for a bit on the subject of indefiniteness rulings at Markman. Long ago, we wrote this post cataloguing which Delaware judges allowed the parties to argue indefiniteness during Markman and which deferred the issue until summary judgment.
At the very bottom of that post, we had a note that Judge Williams had invited indefiniteness argument at a hearing, but we have not yet noted a case where he actually found a claim indefinite.
Until today.
Last week, Judge Williams issued his claim construction ruling in Cisco Sys. Inc v. Ramot at Tel Aviv Univ. Ltd., C.A. No. 21-1365-GBW (D. Del. Nov. 12, 2024). In that decision, in addition to construing several terms, Judge Williams found several indefinite:
The Court holds that claims 45-47 and 49-54 of the '998 patent are "invalid for indefiniteness [as] [those] claims, read in light of the specification delineating the patent, and the prosecution history, fail to inform, with reasonable certainty, those skilled in the art about the scope of the invention." Nautilus, 572 U.S. at 901. Specifically, with respect to those preceding claims, "the problematic limitation" is the "wherein the N bits of the N bit digital input data word are mapped" clause, which "although not directed to a function performed by a user[,] . . . appear[s] in isolation and [is] not 'specifically tied to structure."' KOM Software, No. CV 18-160-WCB, D.I. 116 at 34 n.6.
Id. at 15-16.
The details are pretty straightforward and not worth recounting here, but there can no longer be any doubt that Judge Williams will kill a claim at Markman.
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