NL136415C - - Google Patents
Info
- Publication number
- NL136415C NL136415C NL136415DA NL136415C NL 136415 C NL136415 C NL 136415C NL 136415D A NL136415D A NL 136415DA NL 136415 C NL136415 C NL 136415C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
- H04M1/585—Anti-side-tone circuits implemented without inductive element
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Circuit For Audible Band Transducer (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE16307/65A SE316804B (en:Method) | 1965-12-16 | 1965-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL136415C true NL136415C (en:Method) |
Family
ID=20302033
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL136415D NL136415C (en:Method) | 1965-12-16 | ||
| NL6617469A NL6617469A (en:Method) | 1965-12-16 | 1966-12-13 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6617469A NL6617469A (en:Method) | 1965-12-16 | 1966-12-13 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3513259A (en:Method) |
| DE (1) | DE1487228A1 (en:Method) |
| FR (1) | FR1503218A (en:Method) |
| GB (1) | GB1119268A (en:Method) |
| NL (2) | NL6617469A (en:Method) |
| SE (1) | SE316804B (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2404344A1 (fr) * | 1977-09-27 | 1979-04-20 | Jeumont Schneider | Equipement electronique d'abonne, a circuit de conversion deux fils-quatre fils, pour central telephonique |
| DE2840250C2 (de) * | 1978-09-15 | 1983-01-20 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung für eine leitungsgespeiste Lautfernsprechstation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3041411A (en) * | 1958-06-10 | 1962-06-26 | Donald C Beatty | Automatic, circuit-condition-change-responsive, on-off control for loudspeaking telephone and the like |
| US3075045A (en) * | 1960-08-29 | 1963-01-22 | Bell Telephone Labor Inc | Speakerphone |
-
0
- NL NL136415D patent/NL136415C/xx active
-
1965
- 1965-12-16 SE SE16307/65A patent/SE316804B/xx unknown
-
1966
- 1966-11-04 GB GB49566/66A patent/GB1119268A/en not_active Expired
- 1966-11-09 US US593188A patent/US3513259A/en not_active Expired - Lifetime
- 1966-12-05 FR FR86095A patent/FR1503218A/fr not_active Expired
- 1966-12-13 NL NL6617469A patent/NL6617469A/xx unknown
- 1966-12-13 DE DE19661487228 patent/DE1487228A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SE316804B (en:Method) | 1969-11-03 |
| GB1119268A (en) | 1968-07-10 |
| DE1487228A1 (de) | 1969-04-03 |
| US3513259A (en) | 1970-05-19 |
| NL6617469A (en:Method) | 1967-06-19 |
| FR1503218A (fr) | 1967-11-24 |