NL87345C - - Google Patents
Info
- Publication number
- NL87345C NL87345C NL87345DA NL87345C NL 87345 C NL87345 C NL 87345C NL 87345D A NL87345D A NL 87345DA NL 87345 C NL87345 C NL 87345C
- 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
- 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)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL329213X | 1953-12-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL87345C true NL87345C (en:Method) |
Family
ID=19784289
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NLAANVRAGE7503453,A NL183912B (nl) | 1953-12-24 | Inrichting met een elektronisch afstembare microgolf-trilholte. | |
| NL87345D NL87345C (en:Method) | 1953-12-24 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NLAANVRAGE7503453,A NL183912B (nl) | 1953-12-24 | Inrichting met een elektronisch afstembare microgolf-trilholte. |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2904638A (en:Method) |
| BE (1) | BE534368A (en:Method) |
| CH (1) | CH329213A (en:Method) |
| DE (1) | DE943414C (en:Method) |
| FR (1) | FR1117759A (en:Method) |
| NL (2) | NL87345C (en:Method) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2365996A (en) * | 1942-08-12 | 1944-12-26 | Kellogg Switchboard & Supply | Private branch exchange automatic telephone system |
| US2358237A (en) * | 1942-12-22 | 1944-09-12 | Bell Telephone Labor Inc | Telephone system |
-
0
- BE BE534368D patent/BE534368A/xx unknown
- NL NLAANVRAGE7503453,A patent/NL183912B/xx unknown
- NL NL87345D patent/NL87345C/xx active
-
1954
- 1954-11-18 US US469768A patent/US2904638A/en not_active Expired - Lifetime
- 1954-12-21 DE DEN9936A patent/DE943414C/de not_active Expired
- 1954-12-22 FR FR1117759D patent/FR1117759A/fr not_active Expired
- 1954-12-22 CH CH329213D patent/CH329213A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US2904638A (en) | 1959-09-15 |
| BE534368A (en:Method) | |
| FR1117759A (fr) | 1956-05-28 |
| CH329213A (de) | 1958-04-15 |
| NL183912B (nl) | |
| DE943414C (de) | 1956-05-17 |