BE424612A - - Google Patents
Info
- Publication number
- BE424612A BE424612A BE424612DA BE424612A BE 424612 A BE424612 A BE 424612A BE 424612D A BE424612D A BE 424612DA BE 424612 A BE424612 A BE 424612A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Amplifiers (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US110864A US2159081A (en) | 1936-11-14 | 1936-11-14 | Telephone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE424612A true BE424612A (en) |
Family
ID=27788412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE424612D BE424612A (en) | 1936-11-14 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2159081A (en) |
| BE (1) | BE424612A (en) |
| GB (1) | GB503497A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2482478A (en) * | 1947-03-29 | 1949-09-20 | Automatic Elect Lab | Tone unit |
| BE499462A (en) * | 1949-11-22 |
-
0
- BE BE424612D patent/BE424612A/xx unknown
-
1936
- 1936-11-14 US US110864A patent/US2159081A/en not_active Expired - Lifetime
-
1937
- 1937-10-05 GB GB26971/37A patent/GB503497A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB503497A (en) | 1939-04-05 |
| US2159081A (en) | 1939-05-23 |