NL53871C - - Google Patents
Info
- Publication number
- NL53871C NL53871C NL53871DA NL53871C NL 53871 C NL53871 C NL 53871C NL 53871D A NL53871D A NL 53871DA NL 53871 C NL53871 C NL 53871C
- 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
- H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of DC pulses
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM139644D DE715475C (de) | 1937-10-29 | 1937-10-29 | Schaltung fuer Fernsprechnebenstellenanlagen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL53871C true NL53871C (en:Method) |
Family
ID=7334374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL53871D NL53871C (en:Method) | 1937-10-29 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE715475C (en:Method) |
| NL (1) | NL53871C (en:Method) |
-
0
- NL NL53871D patent/NL53871C/xx active
-
1937
- 1937-10-29 DE DEM139644D patent/DE715475C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE715475C (de) | 1941-12-22 |