BE514161A - - Google Patents
Info
- Publication number
- BE514161A BE514161A BE514161DA BE514161A BE 514161 A BE514161 A BE 514161A BE 514161D A BE514161D A BE 514161DA BE 514161 A BE514161 A BE 514161A
- 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
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE304209X | 1951-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE514161A true BE514161A (pt) |
Family
ID=6116240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE514161D BE514161A (pt) | 1951-12-13 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2744164A (pt) |
| BE (1) | BE514161A (pt) |
| CH (1) | CH304209A (pt) |
| FR (1) | FR1062981A (pt) |
| GB (1) | GB712013A (pt) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE445114A (pt) * | 1941-04-15 | |||
| NL55386C (pt) * | 1941-06-21 | |||
| FR960696A (pt) * | 1942-06-15 | 1950-04-22 |
-
0
- BE BE514161D patent/BE514161A/xx unknown
-
1952
- 1952-06-30 CH CH304209D patent/CH304209A/de unknown
- 1952-07-23 GB GB18689/52A patent/GB712013A/en not_active Expired
- 1952-09-15 FR FR1062981D patent/FR1062981A/fr not_active Expired
- 1952-12-01 US US323365A patent/US2744164A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CH304209A (de) | 1954-12-31 |
| FR1062981A (fr) | 1954-04-28 |
| GB712013A (en) | 1954-07-14 |
| US2744164A (en) | 1956-05-01 |