JPS5439088B2 - - Google Patents
Info
- Publication number
- JPS5439088B2 JPS5439088B2 JP6754375A JP6754375A JPS5439088B2 JP S5439088 B2 JPS5439088 B2 JP S5439088B2 JP 6754375 A JP6754375 A JP 6754375A JP 6754375 A JP6754375 A JP 6754375A JP S5439088 B2 JPS5439088 B2 JP S5439088B2
- 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
- H04M1/02—Constructional features of telephone sets
- H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Headphones And Earphones (AREA)
- Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
- Telephone Set Structure (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6754375A JPS51144105A (en) | 1975-06-06 | 1975-06-06 | Noise-proof telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6754375A JPS51144105A (en) | 1975-06-06 | 1975-06-06 | Noise-proof telephone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS51144105A JPS51144105A (en) | 1976-12-10 |
| JPS5439088B2 true JPS5439088B2 (en) | 1979-11-26 |
Family
ID=13347977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6754375A Granted JPS51144105A (en) | 1975-06-06 | 1975-06-06 | Noise-proof telephone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS51144105A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4942730A (en) * | 1972-05-26 | 1974-04-22 | ||
| JPS508489U (en) * | 1973-05-22 | 1975-01-28 |
-
1975
- 1975-06-06 JP JP6754375A patent/JPS51144105A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4942730A (en) * | 1972-05-26 | 1974-04-22 | ||
| JPS508489U (en) * | 1973-05-22 | 1975-01-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS51144105A (en) | 1976-12-10 |