BE514053A - - Google Patents
Info
- Publication number
- BE514053A BE514053A BE514053DA BE514053A BE 514053 A BE514053 A BE 514053A BE 514053D A BE514053D A BE 514053DA BE 514053 A BE514053 A BE 514053A
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Rectifiers (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL304199X | 1951-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE514053A true BE514053A (nl) |
Family
ID=19783424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE514053D BE514053A (nl) | 1951-09-10 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2794860A (nl) |
| BE (1) | BE514053A (nl) |
| CH (1) | CH304199A (nl) |
| DE (1) | DE920367C (nl) |
| FR (1) | FR1062795A (nl) |
| GB (1) | GB723061A (nl) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2944112A (en) * | 1954-03-15 | 1960-07-05 | Telephony | |
| US2931956A (en) * | 1956-02-06 | 1960-04-05 | Elliott & Evans Inc | Regenerative radio receiver for remotely controlled relay |
| US2955161A (en) * | 1956-06-29 | 1960-10-04 | Automatic Elect Lab | Tone detector for coin control |
| US3147463A (en) * | 1959-05-21 | 1964-09-01 | Bristol Company | Telemetering system |
| US3133158A (en) * | 1960-06-09 | 1964-05-12 | Ericsson Telefon Ab L M | Voice frequency signal receiver |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE481448A (nl) * | 1947-02-07 | |||
| BE501904A (nl) * | 1950-03-17 |
-
0
- BE BE514053D patent/BE514053A/xx unknown
-
1952
- 1952-07-31 US US301852A patent/US2794860A/en not_active Expired - Lifetime
- 1952-09-05 GB GB22399/52A patent/GB723061A/en not_active Expired
- 1952-09-07 DE DEN6052A patent/DE920367C/de not_active Expired
- 1952-09-08 FR FR1062795D patent/FR1062795A/fr not_active Expired
- 1952-09-08 CH CH304199D patent/CH304199A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE920367C (de) | 1954-11-22 |
| FR1062795A (fr) | 1954-04-27 |
| GB723061A (en) | 1955-02-02 |
| US2794860A (en) | 1957-06-04 |
| CH304199A (de) | 1954-12-31 |