The inventor who claims to have developed the first PDA filed a slew of lawsuits Monday, including an action accusing Apple and iPhone partner AT&T of infringing on his patents with the device's much-heralded Visual Voicemail feature. Klausner Technologies is seeking both damages and future royalties that it estimates amount to as much as $360 million.

iPhone Voice Mail Suit Could Tear Hole in Apple's Deep Pockets