NL232514A - - Google Patents
Info
- Publication number
- NL232514A NL232514A NL232514DA NL232514A NL 232514 A NL232514 A NL 232514A NL 232514D A NL232514D A NL 232514DA NL 232514 A NL232514 A NL 232514A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEST13096A DE1046109B (en) | 1957-10-26 | 1957-10-26 | Circuit arrangement for a telephone station for carrying out the key selection according to the voltage comparison method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL232514A true NL232514A (en) |
Family
ID=7455939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL232514D NL232514A (en) | 1957-10-26 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE572410A (en) |
| DE (1) | DE1046109B (en) |
| GB (1) | GB874254A (en) |
| NL (1) | NL232514A (en) |
-
0
- NL NL232514D patent/NL232514A/xx unknown
- BE BE572410D patent/BE572410A/xx unknown
-
1957
- 1957-10-26 DE DEST13096A patent/DE1046109B/en active Pending
-
1958
- 1958-10-24 GB GB3408458A patent/GB874254A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE572410A (en) | |
| GB874254A (en) | 1961-08-02 |
| DE1046109B (en) | 1958-12-11 |