News for hackers. Stuff that matters.
Re:MPEG LA Announces Call for Patents Essential to VP8 Video... by dchest on Friday February 11, 2011 @12:03PM (#2207113)
Or suppose someone else is trying to patent the exact same invention that's already patented by you. The patent examiner makes a mistake and issues a patent.
Re:MPEG LA Announces Call for Patents Essential to VP8 Video... by Natsu on Friday February 11, 2011 @03:04PM (#2207912)
Oh, you mean that patent on the stick as a dog toy? Yeah, that one sucked. I can't believe it took four years, a reexamination by the USPTO Director and referencing no less than two prior patents as prior art to invalidate all of its claims:

http://www.scribd.com/doc/49521/Worlds-Craziest-Patent