NL56428C - - Google Patents
Info
- Publication number
- NL56428C NL56428C NL56428DA NL56428C NL 56428 C NL56428 C NL 56428C NL 56428D A NL56428D A NL 56428DA NL 56428 C NL56428 C NL 56428C
- Authority
- NL
- Netherlands
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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2474220X | 1941-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL56428C true NL56428C (forum.php) |
Family
ID=19874317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL56428D NL56428C (forum.php) | 1941-07-11 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2474220A (forum.php) |
| FR (1) | FR883649A (forum.php) |
| NL (1) | NL56428C (forum.php) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1964110A (en) * | 1931-11-10 | 1934-06-26 | American Telephone & Telegraph | Control system |
| US1932606A (en) * | 1932-06-11 | 1933-10-31 | American Telephone & Telegraph | Gas filled discharge tube control system |
| US2022030A (en) * | 1935-02-16 | 1935-11-26 | Bell Telephone Labor Inc | Signaling system |
| US2104142A (en) * | 1935-12-27 | 1938-01-04 | American Telephone & Telegraph | Gas-filled tube circuits |
| US2214572A (en) * | 1939-04-25 | 1940-09-10 | Press Wireless Inc | Printing telegraph motor control method and apparatus |
-
0
- NL NL56428D patent/NL56428C/xx active
-
1942
- 1942-06-29 FR FR883649D patent/FR883649A/fr not_active Expired
-
1943
- 1943-01-22 US US473272A patent/US2474220A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR883649A (fr) | 1943-07-09 |
| US2474220A (en) | 1949-06-28 |