BE560927A - - Google Patents
Info
- Publication number
- BE560927A BE560927A BE560927DA BE560927A BE 560927 A BE560927 A BE 560927A BE 560927D A BE560927D A BE 560927DA BE 560927 A BE560927 A BE 560927A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US614608A US2885477A (en) | 1956-10-08 | 1956-10-08 | Exclusion arrangement for loudspeaking telephone systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE560927A true BE560927A (de) |
Family
ID=24461989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE560927D BE560927A (de) | 1956-10-08 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2885477A (de) |
| BE (1) | BE560927A (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3170990A (en) * | 1963-03-14 | 1965-02-23 | David L Beatty | Telephone operating device for disabled persons |
| US3304376A (en) * | 1964-01-30 | 1967-02-14 | Bell Telephone Labor Inc | Combination telephone and intercommunications system |
| US3751600A (en) * | 1971-12-22 | 1973-08-07 | Bell Telephone Labor Inc | Combination microphone and control stand for loudspeaking telephone set |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2375791A (en) * | 1943-03-09 | 1945-05-15 | Bell Telephone Labor Inc | Telephone station circuit |
| US2786099A (en) * | 1954-02-09 | 1957-03-19 | Donald C Beatty | Sound amplifying apparatus for telephone circuits |
| BE539848A (de) * | 1954-07-16 |
-
0
- BE BE560927D patent/BE560927A/xx unknown
-
1956
- 1956-10-08 US US614608A patent/US2885477A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2885477A (en) | 1959-05-05 |