Patent ID: 7174137
Filing Date: 2007-02-06
Classification: G08C

Abstract:
1. A wireless transmit-only apparatus comprising: a user interface comprising at least one independently assertable input; a plurality of mechanically resonant devices that differ from one another with respect to a characteristic resonant frequency; a memory containing a plurality of characterizing transmission parameters comprising characterizing transmission parameters that correspond to particular ones of the plurality of mechanically resonant devices, wherein the characterizing transmission parameters correspond to a plurality of transmission messages, which plurality of transmission messages each have: a controller having access to correlation data that correlates the at least one independently assertable inputs with a corresponding one of the plurality of transmission messages and hence to a particular one of the plurality of mechanically resonant devices, such that assertion of the independently assertable input will result in selection of a particular corresponding one of the plurality of mechanically resonant devices for use when transmitting a particular one of the plurality of transmission messages.