Here is something you don't see everyday.
On Thursday, Judge Andrews granted a motion for summary judgment of invalidity for claims that failed to include a limitation from the spec.
In MHL Custom, Inc. v. Waydoo USA, Inc., C.A. No. 21-091-RGA (D. Del. Feb. 2, 2023), the patent at issue described a "passively stable hydrofoil." The hydrofoil is a board that a person can ride in the ocean, with a big fin under the water to keep it stable:

As the Court describes, the whole patent is focused on the board's stability feature:
The specification of the '659 Patent only, and repeatedly, describes the …