NL274038A - - Google Patents
Info
- Publication number
- NL274038A NL274038A NL274038DA NL274038A NL 274038 A NL274038 A NL 274038A NL 274038D A NL274038D A NL 274038DA NL 274038 A NL274038 A NL 274038A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
- H04M1/65—Recording arrangements for recording a message from the calling party
- H04M1/654—Telephone line monitoring circuits therefor, e.g. ring detectors
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB65557A DE1172735B (de) | 1962-01-18 | 1962-01-18 | Schaltungsanordnung zur Abschaltung sprachaufzeichnender Geraete, wie Telefonanrufbeantworter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL274038A true NL274038A (US07223432-20070529-C00017.png) |
Family
ID=6974822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL274038D NL274038A (US07223432-20070529-C00017.png) | 1962-01-18 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1172735B (US07223432-20070529-C00017.png) |
| NL (1) | NL274038A (US07223432-20070529-C00017.png) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE838774C (de) * | 1950-01-06 | 1952-06-23 | Telefonbau & Normalzeit Gmbh | Schaltungsanordnung fuer Tonfrequenzwahl in Fernsprechanlagen |
| DE939820C (de) * | 1952-05-06 | 1956-03-01 | Siemens Ag | Schaltungsanordnung zum Empfang von Spannungen einer oder mehrerer Signalfrequenzen |
| NL235239A (US07223432-20070529-C00017.png) * | 1959-01-19 |
-
0
- NL NL274038D patent/NL274038A/xx unknown
-
1962
- 1962-01-18 DE DEB65557A patent/DE1172735B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE1172735B (de) | 1964-06-25 |
