@walter87
because once very long time ago folks in the telcon industry weren't so sue happy, there was so many cross licensing agreement a lawsuit might actually back fire, seriously back then if Nokia leveled their patent port folio at you it would not be a pretty sight, bear in mind MS and national semiconductor were small fry in the telcon field, it made more sense to try and win the good will of nokia and the other big players and have them co-operate with you rather than earn their wrath