NO133988C - - Google Patents
Info
- Publication number
- NO133988C NO133988C NO446372A NO446372A NO133988C NO 133988 C NO133988 C NO 133988C NO 446372 A NO446372 A NO 446372A NO 446372 A NO446372 A NO 446372A NO 133988 C NO133988 C NO 133988C
- Authority
- NO
- Norway
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Polyamides (AREA)
- Circuit For Audible Band Transducer (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7116826A NL155700B (nl) | 1971-12-08 | 1971-12-08 | Luidsprekende telefooninrichting. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO133988B NO133988B (de) | 1976-04-20 |
| NO133988C true NO133988C (de) | 1976-07-28 |
Family
ID=19814643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO446372A NO133988C (de) | 1971-12-08 | 1972-12-05 |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5331326B2 (de) |
| DE (1) | DE2258415C3 (de) |
| FR (1) | FR2164357A5 (de) |
| GB (1) | GB1367707A (de) |
| NL (1) | NL155700B (de) |
| NO (1) | NO133988C (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO134477C (de) * | 1974-10-29 | 1976-10-13 | Manus Max | |
| JPS5824063B2 (ja) * | 1977-11-14 | 1983-05-19 | 東亜特殊電機株式会社 | 拡声電話機 |
| JPS5469308A (en) * | 1977-11-14 | 1979-06-04 | Toa Electric Co Ltd | Audio switch |
| US4229625A (en) * | 1978-12-29 | 1980-10-21 | Bell Telephone Laboratories, Incorporated | Repeater level control circuit |
| US4346261A (en) * | 1980-03-17 | 1982-08-24 | United Networks, Inc. | Speaker phones |
| DE3034569C2 (de) * | 1980-09-10 | 1983-10-27 | Siemens AG, 1000 Berlin und 8000 München | Sprachgesteuerte Lautfernsprechanlage |
| DD154419A1 (de) * | 1980-12-23 | 1982-03-17 | Helmut Kammholz | Schaltungsanordnung fuer einen fernsprechapparat mit mithoer-und freisprecheinrichtung |
| FR2578127A1 (fr) * | 1985-02-27 | 1986-08-29 | Jeumont Schneider | Procede et dispositif pour la commande d'un poste telephonique a main libre fonctionnant en alternat |
| GB2197166A (en) * | 1986-11-07 | 1988-05-11 | Storno As | Controlling gain in speech-controlled telephones |
| FR2610772B2 (fr) * | 1987-02-10 | 1989-04-28 | Telephonie Ind Commerciale | Dispositif anti-effet larsen pour poste telephonique |
-
1971
- 1971-12-08 NL NL7116826A patent/NL155700B/xx not_active IP Right Cessation
-
1972
- 1972-11-29 DE DE19722258415 patent/DE2258415C3/de not_active Expired
- 1972-12-05 NO NO446372A patent/NO133988C/no unknown
- 1972-12-05 JP JP12195172A patent/JPS5331326B2/ja not_active Expired
- 1972-12-05 GB GB5604972A patent/GB1367707A/en not_active Expired
- 1972-12-07 FR FR7243575A patent/FR2164357A5/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1367707A (en) | 1974-09-18 |
| FR2164357A5 (de) | 1973-07-27 |
| DE2258415B2 (de) | 1979-09-20 |
| DE2258415A1 (de) | 1973-06-14 |
| DE2258415C3 (de) | 1980-06-12 |
| JPS5331326B2 (de) | 1978-09-01 |
| NL155700B (nl) | 1978-01-16 |
| JPS4866310A (de) | 1973-09-11 |
| NO133988B (de) | 1976-04-20 |
| NL7116826A (de) | 1973-06-13 |