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Electronic transmitter device

  • US 4,286,262 A
  • Filed: 09/02/1975
  • Issued: 08/25/1981
  • Est. Priority Date: 09/02/1975
  • Status: Expired due to Term
First Claim
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1. In a system for opening a garage door which includes a radio receiver responsive to a selected radio frequency, means actuated by said receiver for opening said door, and means for transmitting a radio signal of said frequency, the improvement in which said transmitting means includes a socket, a casing having a portion thereof which is insertable into said socket, a transmitter contained within said casing and tuned to said frequency, and means automatically operable when said portion is inserted to a predetermined position within said socket for energizing said transmitter.

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