| http://www.w3.org/ns/prov#value | - Patent US4476573 - Radio link remote control signaling system, and method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsTo permit simultaneous transmission of command codes, in binary command words, with traffic or other announcements, being broadcast over an FM transmitter which has a 57 kHz subcarrier AM modulated by an announcement r
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