NL235237A - - Google Patents
Info
- Publication number
- NL235237A NL235237A NL235237DA NL235237A NL 235237 A NL235237 A NL 235237A NL 235237D A NL235237D A NL 235237DA NL 235237 A NL235237 A NL 235237A
- 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
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1112554X | 1959-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL235237A true NL235237A (US06534493-20030318-C00166.png) |
Family
ID=19869411
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL235237D NL235237A (US06534493-20030318-C00166.png) | 1959-01-19 | ||
| NL124925D NL124925C (US06534493-20030318-C00166.png) | 1959-01-19 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL124925D NL124925C (US06534493-20030318-C00166.png) | 1959-01-19 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1112554B (US06534493-20030318-C00166.png) |
| NL (2) | NL124925C (US06534493-20030318-C00166.png) |
-
0
- NL NL235237D patent/NL235237A/xx unknown
- NL NL124925D patent/NL124925C/xx active
-
1960
- 1960-01-16 DE DEJ17536A patent/DE1112554B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL124925C (US06534493-20030318-C00166.png) | |
| DE1112554B (de) | 1961-08-10 |
