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Automatic handset-speakephone switching arrangement for portable communication device 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04M-011/00
출원번호 US-0861713 (1992-04-01)
발명자 / 주소
  • Bowen Donald J. (Aberdeen NJ) Erving Richard H. (Piscataway NJ) Miller
  • II Robert R. (Morris Township
  • Morris County NJ)
출원인 / 주소
  • AT&T Bell Laboratories (Murray Hill NJ 02)
인용정보 피인용 횟수 : 90  인용 특허 : 0

초록

A personal communicator handset is designed to operate as both a handset and as a speakerphone and to automatically switch between the two modes based on distance between the handset and the user\s ear. This distance is determined by an infrared range detection unit built into the handset.

대표청구항

A wireless portable personal radiotelephone communication device, comprising: a portable subscriber handheld structure including in a single package, an audio input-to-electrical transducer and an electrical-to-audio output transducer, the electrical-to-audio output transducer selectively alternativ

이 특허를 인용한 특허 (90)

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