NL81447C - - Google Patents
Info
- Publication number
- NL81447C NL81447C NL81447DA NL81447C NL 81447 C NL81447 C NL 81447C NL 81447D A NL81447D A NL 81447DA NL 81447 C NL81447 C NL 81447C
- 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
- H04Q1/48—Induced-current signalling arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Relay Circuits (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE705723X | 1950-11-21 | ||
| SE2712571X | 1950-11-21 | ||
| SE1048924X | 1950-11-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL81447C true NL81447C (https=) |
Family
ID=27354992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL81447D NL81447C (https=) | 1950-11-21 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2712571A (https=) |
| BE (1) | BE507213A (https=) |
| GB (1) | GB705723A (https=) |
| NL (1) | NL81447C (https=) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL289634A (https=) * | 1962-03-01 | |||
| DE1287162B (de) * | 1964-08-17 | 1969-01-16 | Int Standard Electric Corp | Verfahren und Schaltungsanordnung zur Waehlziffernuebertragung ueber eine zwei Fernsprechzentralen verbindende zweiadrige Verbindungsleitung |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2186315A (en) * | 1937-04-19 | 1940-01-09 | Siemens Ag | Telephone system |
| US2236797A (en) * | 1937-08-02 | 1941-04-01 | Fides Gmbh | Telephone system |
-
0
- NL NL81447D patent/NL81447C/xx active
- BE BE507213D patent/BE507213A/xx unknown
-
1951
- 1951-10-26 US US253345A patent/US2712571A/en not_active Expired - Lifetime
- 1951-11-21 GB GB27331/51A patent/GB705723A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2712571A (en) | 1955-07-05 |
| BE507213A (https=) | |
| GB705723A (en) | 1954-03-17 |