NL7828C - - Google Patents
Info
- Publication number
- NL7828C NL7828C NL7828DA NL7828C NL 7828 C NL7828 C NL 7828C NL 7828D A NL7828D A NL 7828DA NL 7828 C NL7828 C NL 7828C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US215235A US1435249A (en) | 1918-02-04 | 1918-02-04 | Automatic telephone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7828C true NL7828C (it) |
Family
ID=22802193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7828D NL7828C (it) | 1918-02-04 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1435249A (it) |
| DE (1) | DE393560C (it) |
| FR (1) | FR495450A (it) |
| GB (1) | GB123053A (it) |
| NL (1) | NL7828C (it) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE765694C (de) * | 1933-05-13 | 1953-02-23 | Siemens & Halske A G | Schaltungsanordnung zur Kennzeichnung verschiedener Verkehrsrichtungen in Fernsprechanlagen |
-
0
- DE DENDAT393560D patent/DE393560C/de active Active
- NL NL7828D patent/NL7828C/xx active
-
1918
- 1918-02-04 US US215235A patent/US1435249A/en not_active Expired - Lifetime
- 1918-09-23 GB GB15434/18A patent/GB123053A/en not_active Expired
-
1919
- 1919-02-03 FR FR495450A patent/FR495450A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE393560C (it) | |
| FR495450A (fr) | 1919-10-08 |
| US1435249A (en) | 1922-11-14 |
| GB123053A (en) | 1919-04-03 |