NL60456C - - Google Patents
Info
- Publication number
- NL60456C NL60456C NL60456DA NL60456C NL 60456 C NL60456 C NL 60456C NL 60456D A NL60456D A NL 60456DA NL 60456 C NL60456 C NL 60456C
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/42—Circuits for by-passing of ringing signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR986988T | 1943-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL60456C true NL60456C (en:Method) |
Family
ID=9538574
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL116168D NL116168B (en:Method) | 1943-12-22 | ||
| NL60456D NL60456C (en:Method) | 1943-12-22 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL116168D NL116168B (en:Method) | 1943-12-22 |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH270404A (en:Method) |
| FR (1) | FR986988A (en:Method) |
| NL (2) | NL60456C (en:Method) |
-
0
- NL NL116168D patent/NL116168B/xx unknown
- NL NL60456D patent/NL60456C/xx active
-
1943
- 1943-12-22 FR FR986988D patent/FR986988A/fr not_active Expired
-
1947
- 1947-08-25 CH CH270404D patent/CH270404A/fr unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH270404A (fr) | 1950-08-31 |
| FR986988A (fr) | 1951-08-07 |
| NL116168B (en:Method) |