https://www.macrumors.com/2011/06/16/lodsys-patent-invalidation-efforts-apple-barred-15000-bounty-for-crowdsourced-research/
Lodsys Patent Invalidation Efforts: Apple Barred? $15,000 Bounty for Crowdsourced Research -...
Lodsys, the patent holding company currently taking on App Store developers over their use of in app purchasing and upgrade buttons, is under increasing attack...
patent invalidation
https://appleinsider.com/articles/20/06/18/apple-trying-to-head-off-new-lawsuit-by-ixi-seeking-patent-invalidation
Apple trying to head off new lawsuit by IXI, seeking patent invalidation | AppleInsider
Late on Monday, Apple filed for invalidation and non-infringement of a patent central to a long-running legal battle about the Personal Hotspot feature on the...