BE427559A - - Google Patents
Info
- Publication number
- BE427559A BE427559A BE427559DA BE427559A BE 427559 A BE427559 A BE 427559A BE 427559D A BE427559D A BE 427559DA BE 427559 A BE427559 A BE 427559A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/04—Frames or mounting racks for selector switches; Accessories therefor, e.g. frame cover
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/76—Wired systems
- H04H20/77—Wired systems using carrier waves
- H04H20/81—Wired systems using carrier waves combined with telephone network over which the broadcast is continuously available
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/16—Arrangements for interconnection between switching centres in systems employing carrier frequencies
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Structure Of Telephone Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Exchange Systems With Centralized Control (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE497534X | 1937-04-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE427559A true BE427559A (es) | 1938-05-31 |
Family
ID=6545191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE427559D BE427559A (es) | 1937-04-13 | 1938-04-13 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2208917A (es) |
| BE (1) | BE427559A (es) |
| CH (1) | CH203270A (es) |
| FR (1) | FR836524A (es) |
| GB (1) | GB497534A (es) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL151270B (nl) * | 1949-01-26 | North American Aviation Inc | Monokristallijn lichaam van alfa-aluminiumoxyde waarop een laag monokristallijn silicium is aangebracht. |
-
1938
- 1938-04-09 CH CH203270D patent/CH203270A/de unknown
- 1938-04-12 FR FR836524D patent/FR836524A/fr not_active Expired
- 1938-04-12 GB GB11219/38A patent/GB497534A/en not_active Expired
- 1938-04-13 US US201715A patent/US2208917A/en not_active Expired - Lifetime
- 1938-04-13 BE BE427559D patent/BE427559A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US2208917A (en) | 1940-07-23 |
| CH203270A (de) | 1939-02-28 |
| GB497534A (en) | 1938-12-21 |
| FR836524A (fr) | 1939-01-19 |