I like this one: http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=...

"[...] approaches for preventing an accidental termination of a phone call session.". The patent actually covers the event of when a user:

1) is in a call

2) taps dismiss

3) phone decide to dismiss or continue because [wildcard] reason.

So the functionality in my Samsung that "decide" whether to ignore or continue when I tap dismiss with my chin is patented, cool.