FR587290A - - Google Patents
Info
- Publication number
- FR587290A FR587290A FR587290DA FR587290A FR 587290 A FR587290 A FR 587290A FR 587290D A FR587290D A FR 587290DA FR 587290 A FR587290 A FR 587290A
- 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
- H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US664825A US1550769A (en) | 1923-09-26 | 1923-09-26 | Telephone-exchange system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR587290A true FR587290A (fr) | 1925-04-15 |
Family
ID=24667594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR587290D Expired FR587290A (fr) | 1923-09-26 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1550769A (fr) |
| FR (1) | FR587290A (fr) |
| GB (1) | GB222502A (fr) |
-
0
- FR FR587290D patent/FR587290A/fr not_active Expired
-
1923
- 1923-09-26 US US664825A patent/US1550769A/en not_active Expired - Lifetime
-
1924
- 1924-09-26 GB GB22793/24A patent/GB222502A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB222502A (en) | 1925-05-21 |
| US1550769A (en) | 1925-08-25 |