NL80217C - - Google Patents
Info
- Publication number
- NL80217C NL80217C NL80217DA NL80217C NL 80217 C NL80217 C NL 80217C NL 80217D A NL80217D A NL 80217DA NL 80217 C NL80217 C NL 80217C
- 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
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEM4081A DE903824C (en) | 1950-06-15 | 1950-06-15 | Electrical signal receivers, in particular audio frequency signal receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL80217C true NL80217C (en) |
Family
ID=7292504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL80217D NL80217C (en) | 1950-06-15 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE903824C (en) |
| NL (1) | NL80217C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1001709B (en) * | 1953-02-24 | 1957-01-31 | Int Standard Electric Corp | Audio frequency signal receiver for two frequencies |
| DE1002824B (en) * | 1954-07-08 | 1957-02-21 | Radio Electr Soc Fr | Switching device for wireless connections with pulse operation |
| DE1280995B (en) * | 1961-04-05 | 1968-10-24 | Siemens Ag | Character receiver of high selectivity |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE711592C (en) * | 1933-06-24 | 1941-10-03 | Siemens & Halske Akt Ges | Signal receiver for telephone systems |
| GB485652A (en) * | 1936-10-20 | 1938-05-20 | Telephone Mfg Co Ltd | Improvements in and relating to telephone systems and the like |
| GB495162A (en) * | 1938-02-22 | 1938-11-08 | Arthur Reginald Albert Rendall | Improvements in and relating to alternating current signalling systems |
| FR963277A (en) * | 1947-02-21 | 1950-07-05 |
-
0
- NL NL80217D patent/NL80217C/xx active
-
1950
- 1950-06-15 DE DEM4081A patent/DE903824C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE903824C (en) | 1954-02-11 |