NL290179A - - Google Patents
Info
- Publication number
- NL290179A NL290179A NL290179DA NL290179A NL 290179 A NL290179 A NL 290179A NL 290179D A NL290179D A NL 290179DA NL 290179 A NL290179 A NL 290179A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
-
- 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)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE281262 | 1962-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL290179A true NL290179A (en:Method) |
Family
ID=20260761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL290179D NL290179A (en:Method) | 1962-03-14 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3296380A (en:Method) |
| BE (1) | BE629618A (en:Method) |
| CH (1) | CH434370A (en:Method) |
| DE (1) | DE1303458B (en:Method) |
| GB (1) | GB1032277A (en:Method) |
| NL (1) | NL290179A (en:Method) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB732028A (en:Method) * | ||||
| US2534854A (en) * | 1949-02-08 | 1950-12-19 | Philco Corp | Variable inductance device |
| US2682576A (en) * | 1951-01-20 | 1954-06-29 | Irving H Selden | Telephone system |
| NL195653A (en:Method) * | 1954-03-27 | Ericsson Telefon Ab L M |
-
0
- DE DENDAT1303458D patent/DE1303458B/de active Pending
- NL NL290179D patent/NL290179A/xx unknown
- BE BE629618D patent/BE629618A/xx unknown
-
1963
- 1963-03-13 US US264816A patent/US3296380A/en not_active Expired - Lifetime
- 1963-03-13 GB GB9975/63A patent/GB1032277A/en not_active Expired
- 1963-03-14 CH CH322163A patent/CH434370A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE629618A (en:Method) | |
| DE1303458B (en:Method) | 1971-11-04 |
| US3296380A (en) | 1967-01-03 |
| GB1032277A (en) | 1966-06-08 |
| CH434370A (de) | 1967-04-30 |