JPH01122653U - - Google Patents
Info
- Publication number
- JPH01122653U JPH01122653U JP1965988U JP1965988U JPH01122653U JP H01122653 U JPH01122653 U JP H01122653U JP 1965988 U JP1965988 U JP 1965988U JP 1965988 U JP1965988 U JP 1965988U JP H01122653 U JPH01122653 U JP H01122653U
- Authority
- JP
- Japan
- Prior art keywords
- transmitting
- receiving
- intercom device
- line
- howling
- 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 1
- 239000011159 matrix material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1965988U JPH01122653U (pl) | 1988-02-16 | 1988-02-16 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1965988U JPH01122653U (pl) | 1988-02-16 | 1988-02-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01122653U true JPH01122653U (pl) | 1989-08-21 |
Family
ID=31235363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1965988U Pending JPH01122653U (pl) | 1988-02-16 | 1988-02-16 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01122653U (pl) |
-
1988
- 1988-02-16 JP JP1965988U patent/JPH01122653U/ja active Pending
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