JPS4974807A - - Google Patents
Info
- Publication number
- JPS4974807A JPS4974807A JP11633372A JP11633372A JPS4974807A JP S4974807 A JPS4974807 A JP S4974807A JP 11633372 A JP11633372 A JP 11633372A JP 11633372 A JP11633372 A JP 11633372A JP S4974807 A JPS4974807 A JP S4974807A
- 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.)
- Pending
Links
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11633372A JPS4974807A (en) | 1972-11-20 | 1972-11-20 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11633372A JPS4974807A (en) | 1972-11-20 | 1972-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS4974807A true JPS4974807A (en) | 1974-07-19 |
Family
ID=14684353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11633372A Pending JPS4974807A (en) | 1972-11-20 | 1972-11-20 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS4974807A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59178850A (en) * | 1983-03-30 | 1984-10-11 | Fujitsu Ltd | System for detecting incoming call |
JPS6072053U (en) * | 1983-10-24 | 1985-05-21 | 富士通株式会社 | ringer detection device |
JPH036157A (en) * | 1989-06-01 | 1991-01-11 | Nec Corp | Ringer signal detecting circuit |
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1972
- 1972-11-20 JP JP11633372A patent/JPS4974807A/ja active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59178850A (en) * | 1983-03-30 | 1984-10-11 | Fujitsu Ltd | System for detecting incoming call |
JPS6072053U (en) * | 1983-10-24 | 1985-05-21 | 富士通株式会社 | ringer detection device |
JPH036157A (en) * | 1989-06-01 | 1991-01-11 | Nec Corp | Ringer signal detecting circuit |