JPH0391388U - - Google Patents
Info
- Publication number
- JPH0391388U JPH0391388U JP15273989U JP15273989U JPH0391388U JP H0391388 U JPH0391388 U JP H0391388U JP 15273989 U JP15273989 U JP 15273989U JP 15273989 U JP15273989 U JP 15273989U JP H0391388 U JPH0391388 U JP H0391388U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmitter
- control circuit
- speaker
- discriminating means
- 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
Landscapes
- Electrically Operated Instructional Devices (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15273989U JPH0391388U (en]) | 1989-12-30 | 1989-12-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15273989U JPH0391388U (en]) | 1989-12-30 | 1989-12-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0391388U true JPH0391388U (en]) | 1991-09-18 |
Family
ID=31698993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15273989U Pending JPH0391388U (en]) | 1989-12-30 | 1989-12-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0391388U (en]) |
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1989
- 1989-12-30 JP JP15273989U patent/JPH0391388U/ja active Pending