BE693524A - - Google Patents
Info
- Publication number
- BE693524A BE693524A BE693524DA BE693524A BE 693524 A BE693524 A BE 693524A BE 693524D A BE693524D A BE 693524DA BE 693524 A BE693524 A BE 693524A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US52457966A | 1966-02-02 | 1966-02-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE693524A true BE693524A (da) | 1967-07-17 |
Family
ID=24089795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE693524D BE693524A (da) | 1966-02-02 | 1967-02-02 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3511931A (da) |
| BE (1) | BE693524A (da) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1395495A (en) * | 1971-06-30 | 1975-05-29 | Post Office | Telephone conference amplifier |
| US3761624A (en) * | 1972-07-31 | 1973-09-25 | Bell Telephone Labor Inc | Time division signal transfer network |
| US3824344A (en) * | 1973-03-22 | 1974-07-16 | Bell Telephone Labor Inc | Conference bridge circuit |
| US4278843A (en) * | 1974-04-01 | 1981-07-14 | Anaconda-Ericsson Inc. | Two-way amplifier arrangement |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA602932A (en) * | 1960-08-02 | Northern Electric Company | Telephone conference system | |
| US2035536A (en) * | 1934-06-09 | 1936-03-31 | American Telephone & Telegraph | Interconnection of transmission lines |
| US3060265A (en) * | 1960-01-26 | 1962-10-23 | Itt | Conference call circuit |
| US3399275A (en) * | 1964-07-13 | 1968-08-27 | Stromberg Carlson Corp | Conference circuit with suppressed sidetones |
-
1966
- 1966-02-02 US US524579A patent/US3511931A/en not_active Expired - Lifetime
-
1967
- 1967-02-02 BE BE693524D patent/BE693524A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US3511931A (en) | 1970-05-12 |