FR549706A - - Google Patents
Info
- Publication number
- FR549706A FR549706A FR549706DA FR549706A FR 549706 A FR549706 A FR 549706A FR 549706D A FR549706D A FR 549706DA FR 549706 A FR549706 A FR 549706A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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
- H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
- H04Q3/625—Arrangements in the private branch exchange
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US458973A US1597032A (en) | 1921-04-05 | 1921-04-05 | Automatic telephone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR549706A true FR549706A (cs) | 1923-02-17 |
Family
ID=23822866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR549706D Expired FR549706A (cs) | 1921-04-05 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1597032A (cs) |
| FR (1) | FR549706A (cs) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3041406A (en) * | 1959-12-14 | 1962-06-26 | Gen Dynamics Corp | Inward dialing to private branch exchange |
-
0
- FR FR549706D patent/FR549706A/fr not_active Expired
-
1921
- 1921-04-05 US US458973A patent/US1597032A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1597032A (en) | 1926-08-24 |