BE331755A - - Google Patents
Info
- Publication number
- BE331755A BE331755A BE331755DA BE331755A BE 331755 A BE331755 A BE 331755A BE 331755D A BE331755D A BE 331755DA BE 331755 A BE331755 A BE 331755A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
- H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/04—Control of transmission; Equalising
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US5148A US1696595A (en) | 1925-01-27 | 1925-01-27 | High-frequency duplex signaling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE331755A true BE331755A (US20090163788A1-20090625-C00002.png) |
Family
ID=21714424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE331755D BE331755A (US20090163788A1-20090625-C00002.png) | 1925-01-27 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1696595A (US20090163788A1-20090625-C00002.png) |
| BE (1) | BE331755A (US20090163788A1-20090625-C00002.png) |
| DE (1) | DE522801C (US20090163788A1-20090625-C00002.png) |
-
0
- BE BE331755D patent/BE331755A/xx unknown
-
1925
- 1925-01-27 US US5148A patent/US1696595A/en not_active Expired - Lifetime
-
1926
- 1926-01-08 DE DER66405D patent/DE522801C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1696595A (en) | 1928-12-25 |
| DE522801C (de) | 1931-04-15 |
