smb@research.att.com (12/25/88)
TouchTone is no longer a trademark. When AT&T was broken up, it wanted to keep the phrase as a trademark for telephones, and the RBOCs wanted to keep it to describe their service. The only solution they came up with was to release the phrase. Those with an eye for trivia will note that Radio Shack, for example, no longer speaks of ``Tone Phones'' -- their trademark for DTMF equipment -- since they can now say TouchTone.