JPS5543663B2 - - Google Patents
Info
- Publication number
- JPS5543663B2 JPS5543663B2 JP5531976A JP5531976A JPS5543663B2 JP S5543663 B2 JPS5543663 B2 JP S5543663B2 JP 5531976 A JP5531976 A JP 5531976A JP 5531976 A JP5531976 A JP 5531976A JP S5543663 B2 JPS5543663 B2 JP S5543663B2
- Authority
- JP
- Japan
- 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.)
- Expired
Links
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5531976A JPS52139306A (en) | 1976-05-17 | 1976-05-17 | Calling system for key telephone equipment |
US06/066,927 US4410767A (en) | 1976-05-17 | 1979-08-16 | Key telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5531976A JPS52139306A (en) | 1976-05-17 | 1976-05-17 | Calling system for key telephone equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS52139306A JPS52139306A (en) | 1977-11-21 |
JPS5543663B2 true JPS5543663B2 (en) | 1980-11-07 |
Family
ID=12995218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5531976A Granted JPS52139306A (en) | 1976-05-17 | 1976-05-17 | Calling system for key telephone equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS52139306A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53116707A (en) * | 1977-03-22 | 1978-10-12 | Tamura Electric Works Ltd | Button telephone set |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5213706A (en) * | 1975-07-23 | 1977-02-02 | Kanda Tsushin Kogyo Kk | Key telephone system |
-
1976
- 1976-05-17 JP JP5531976A patent/JPS52139306A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5213706A (en) * | 1975-07-23 | 1977-02-02 | Kanda Tsushin Kogyo Kk | Key telephone system |
Also Published As
Publication number | Publication date |
---|---|
JPS52139306A (en) | 1977-11-21 |