NL137222B - - Google Patents
Info
- Publication number
- NL137222B NL137222B NL137222DA NL137222B NL 137222 B NL137222 B NL 137222B NL 137222D A NL137222D A NL 137222DA NL 137222 B NL137222 B NL 137222B
- Authority
- NL
- Netherlands
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)
- Interface Circuits In Exchanges (AREA)
- Developing Agents For Electrophotography (AREA)
- Adhesives Or Adhesive Processes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US295012A US2293191A (en) | 1939-09-15 | 1939-09-15 | Telephone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL137222B true NL137222B (ko) |
Family
ID=23135853
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL70954D NL70954C (ko) | 1939-09-15 | ||
| NL137222D NL137222B (ko) | 1939-09-15 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL70954D NL70954C (ko) | 1939-09-15 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2293191A (ko) |
| FR (1) | FR962198A (ko) |
| GB (1) | GB653002A (ko) |
| NL (2) | NL137222B (ko) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2465539A (en) * | 1946-12-20 | 1949-03-29 | Bell Telephone Labor Inc | Call failure signaling arrangement |
-
0
- NL NL70954D patent/NL70954C/xx active
- FR FR962198D patent/FR962198A/fr not_active Expired
- NL NL137222D patent/NL137222B/xx unknown
-
1939
- 1939-09-15 US US295012A patent/US2293191A/en not_active Expired - Lifetime
-
1948
- 1948-02-20 GB GB5088/48A patent/GB653002A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB653002A (en) | 1951-05-09 |
| FR962198A (ko) | 1950-06-02 |
| NL70954C (ko) | |
| US2293191A (en) | 1942-08-18 |