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Radio broadcast communication systems with multiple loop antennas

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H01Q-007/00
출원번호 US-0141246 (1988-01-06)
발명자 / 주소
  • Stevens John K. (8 Alexander Street Brampton
  • Ontario CAX L6V 1H6) Waterhouse Paul I. (8 Main Street Lynden
  • Ontario CAX L0R 1T0)
인용정보 피인용 횟수 : 108  인용 특허 : 1

초록

The invention comprises a low power broadcast system that is applicable especially to the so-called “electronic shelf”for retail stores, wherein the shelf edge carries price displaying modules that can be addressed and controlled from a central computer operated station. The system also permits the

대표청구항

A radio broadcast system comprising: a base transmitter/receiver including transmitting means for transmitting a first reference signal of a first frequency, and transmit/receive means for transmitting and receiving respective second data modulated signals of frequencies which are a multiple of the

이 특허에 인용된 특허 (1)

  1. Vorie Gilbert C. (Newark NY), Compact omnidirectional antenna array.

이 특허를 인용한 특허 (108)

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