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
Links
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Selective Calling Equipment (AREA)
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) |
-
1988
- 1988-05-20 JP JP6721688U patent/JPH01169898U/ja active Pending