JPH01169898U - - Google Patents

Info

Publication number
JPH01169898U
JPH01169898U JP6721688U JP6721688U JPH01169898U JP H01169898 U JPH01169898 U JP H01169898U JP 6721688 U JP6721688 U JP 6721688U JP 6721688 U JP6721688 U JP 6721688U JP H01169898 U JPH01169898 U JP H01169898U
Authority
JP
Japan
Prior art keywords
listener
pair
ultrasonic waves
speaker
remote control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6721688U
Other languages
English (en)
Japanese (ja)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP6721688U priority Critical patent/JPH01169898U/ja
Publication of JPH01169898U publication Critical patent/JPH01169898U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Selective Calling Equipment (AREA)
JP6721688U 1988-05-20 1988-05-20 Pending JPH01169898U (es)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6721688U JPH01169898U (es) 1988-05-20 1988-05-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6721688U JPH01169898U (es) 1988-05-20 1988-05-20

Publications (1)

Publication Number Publication Date
JPH01169898U true JPH01169898U (es) 1989-11-30

Family

ID=31292599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6721688U Pending JPH01169898U (es) 1988-05-20 1988-05-20

Country Status (1)

Country Link
JP (1) JPH01169898U (es)

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