JPH01135590U - - Google Patents

Info

Publication number
JPH01135590U
JPH01135590U JP3000888U JP3000888U JPH01135590U JP H01135590 U JPH01135590 U JP H01135590U JP 3000888 U JP3000888 U JP 3000888U JP 3000888 U JP3000888 U JP 3000888U JP H01135590 U JPH01135590 U JP H01135590U
Authority
JP
Japan
Prior art keywords
reflected
ultrasonic
regular intervals
waves
receives
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
JP3000888U
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 JP3000888U priority Critical patent/JPH01135590U/ja
Publication of JPH01135590U publication Critical patent/JPH01135590U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Burglar Alarm Systems (AREA)
  • Emergency Alarm Devices (AREA)
  • Transducers For Ultrasonic Waves (AREA)
JP3000888U 1988-03-07 1988-03-07 Pending JPH01135590U (US07652168-20100126-C00068.png)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3000888U JPH01135590U (US07652168-20100126-C00068.png) 1988-03-07 1988-03-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3000888U JPH01135590U (US07652168-20100126-C00068.png) 1988-03-07 1988-03-07

Publications (1)

Publication Number Publication Date
JPH01135590U true JPH01135590U (US07652168-20100126-C00068.png) 1989-09-18

Family

ID=31254687

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3000888U Pending JPH01135590U (US07652168-20100126-C00068.png) 1988-03-07 1988-03-07

Country Status (1)

Country Link
JP (1) JPH01135590U (US07652168-20100126-C00068.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0340152U (US07652168-20100126-C00068.png) * 1989-08-18 1991-04-17

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0340152U (US07652168-20100126-C00068.png) * 1989-08-18 1991-04-17

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