What does 'inherency' mean in patent law?

Inherency means a feature or function is so fundamental to an invention that it's necessarily present, even if not explicitly stated in the patent description.

Why did the Federal Circuit reverse the PTAB's decision?

The Federal Circuit found that the PTAB did not provide sufficient evidence to prove that the prior art *inherently* disclosed the disputed patent claim. Mere possibility was not enough.

Does this ruling help Apple directly?

Indirectly. By overturning a decision that would have invalidated PersonalWeb's patent claims, this ruling allows PersonalWeb to continue asserting its patent, which could impact Apple's products if they infringe.

©️ IP & Copyright

Federal Circuit Rejects PTAB's 'Inherency' Ruling Against Apple

The Federal Circuit just told the Patent Trial and Appeal Board (PTAB) they're doing their homework wrong, again. This time, it's all about 'inherency' in patent law, and Apple's lawyers are probably popping champagne.

Legal AI Beat Apr 12, 2026 5 min read

A gavel striking a block in a courtroom, symbolizing a legal ruling.

⚡ Key Takeaways

The Federal Circuit again rejected the PTAB's finding that Apple's patent claims were invalid due to obviousness. 𝕏
The court emphasized that proving 'inherency' requires demonstrating a natural and inevitable result, not just a possibility. 𝕏
This ruling highlights the high evidentiary standard required to invalidate patents based on inherency arguments. 𝕏