JPS5536224B2 - - Google Patents
Info
- Publication number
- JPS5536224B2 JPS5536224B2 JP14961076A JP14961076A JPS5536224B2 JP S5536224 B2 JPS5536224 B2 JP S5536224B2 JP 14961076 A JP14961076 A JP 14961076A JP 14961076 A JP14961076 A JP 14961076A JP S5536224 B2 JPS5536224 B2 JP S5536224B2
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/68—Circuit arrangements for preventing eavesdropping
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14961076A JPS5373010A (en) | 1976-12-13 | 1976-12-13 | Privacy call circuit of buttom telephon device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14961076A JPS5373010A (en) | 1976-12-13 | 1976-12-13 | Privacy call circuit of buttom telephon device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5373010A JPS5373010A (en) | 1978-06-29 |
JPS5536224B2 true JPS5536224B2 (en) | 1980-09-19 |
Family
ID=15478959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14961076A Granted JPS5373010A (en) | 1976-12-13 | 1976-12-13 | Privacy call circuit of buttom telephon device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5373010A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS494962A (en) * | 1972-04-27 | 1974-01-17 | ||
JPS4996604A (en) * | 1973-01-13 | 1974-09-12 |
-
1976
- 1976-12-13 JP JP14961076A patent/JPS5373010A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS494962A (en) * | 1972-04-27 | 1974-01-17 | ||
JPS4996604A (en) * | 1973-01-13 | 1974-09-12 |
Also Published As
Publication number | Publication date |
---|---|
JPS5373010A (en) | 1978-06-29 |