JPH0193863U - - Google Patents
Info
- Publication number
- JPH0193863U JPH0193863U JP18995087U JP18995087U JPH0193863U JP H0193863 U JPH0193863 U JP H0193863U JP 18995087 U JP18995087 U JP 18995087U JP 18995087 U JP18995087 U JP 18995087U JP H0193863 U JPH0193863 U JP H0193863U
- Authority
- JP
- Japan
- Prior art keywords
- base unit
- doorphone
- input
- interface device
- audio
- 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
- 230000002265 prevention Effects 0.000 claims description 2
- 230000005236 sound signal Effects 0.000 claims 3
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18995087U JPH0193863U (fr) | 1987-12-16 | 1987-12-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18995087U JPH0193863U (fr) | 1987-12-16 | 1987-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0193863U true JPH0193863U (fr) | 1989-06-20 |
Family
ID=31480956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18995087U Pending JPH0193863U (fr) | 1987-12-16 | 1987-12-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0193863U (fr) |
-
1987
- 1987-12-16 JP JP18995087U patent/JPH0193863U/ja active Pending
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