What do AT&T, Apple, Comcast, Cablevision and eBay all have in common? They are all being sued today by Klausner Technologies over visual voicemail patents the company says it owns and which it feels these well known, other companies have not yet requested a patent license for.

The suits were filed by the company which “was founded by Judah Klausner, the inventor of the PDA and electronic organizer.” Klausner Technologies says Cablevision’s Optimum Voicemail, Comcast’s Digital Voice Voicemail, eBay’s Skype Voicemail and AT&T/Apple’s iPhone Visual Voicemail services all violate patents it holds which allow “users to selectively retrieve and listen to voice messages via message inbox displays.”