FR745147A - - Google Patents
Info
- Publication number
- FR745147A FR745147A FR745147DA FR745147A FR 745147 A FR745147 A FR 745147A FR 745147D A FR745147D A FR 745147DA FR 745147 A FR745147 A FR 745147A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/68—Tubes specially designed to act as oscillator with positive grid and retarding field, e.g. for Barkhausen-Kurz oscillators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Selective Calling Equipment (AREA)
- Mobile Radio Communication Systems (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Toys (AREA)
- Transducers For Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB30721/31A GB392210A (en) | 1931-11-05 | 1931-11-05 | Improvements in or relating to short wave radio communication systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR745147A true FR745147A (es) | 1933-05-05 |
Family
ID=10312099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR745147D Expired FR745147A (es) | 1931-11-05 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2064481A (es) |
| BE (1) | BE392118A (es) |
| DE (1) | DE686680C (es) |
| FR (1) | FR745147A (es) |
| GB (2) | GB392210A (es) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2485559A (en) * | 1945-04-12 | 1949-10-25 | Farnsworth Res Corp | Ultra high frequency amplifier system |
| JP4909798B2 (ja) * | 2007-04-27 | 2012-04-04 | 株式会社日立製作所 | スケルトン等化アンテナ、同アンテナを用いたｒｆｉｄタグおよびｒｆｉｄシステム |
-
0
- FR FR745147D patent/FR745147A/fr not_active Expired
- BE BE392118D patent/BE392118A/xx unknown
-
1931
- 1931-11-05 GB GB30721/31A patent/GB392210A/en not_active Expired
-
1932
- 1932-06-27 GB GB12535/33A patent/GB403674A/en not_active Expired
- 1932-10-11 DE DE1932M0121350 patent/DE686680C/de not_active Expired
- 1932-10-25 US US639462A patent/US2064481A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| BE392118A (es) | |
| DE686680C (de) | 1940-01-18 |
| GB392210A (en) | 1933-05-05 |
| US2064481A (en) | 1936-12-15 |
| GB403674A (en) | 1933-12-27 |