BE431992A - - Google Patents
Info
- Publication number
- BE431992A BE431992A BE431992DA BE431992A BE 431992 A BE431992 A BE 431992A BE 431992D A BE431992D A BE 431992DA BE 431992 A BE431992 A BE 431992A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/76—Dynamic electron-multiplier tubes, e.g. Farnsworth multiplier tube, multipactor
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US183420A US2239149A (en) | 1938-01-05 | 1938-01-05 | Electronic amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE431992A true BE431992A (en:Method) | 1939-02-28 |
Family
ID=22672715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE431992D BE431992A (en:Method) | 1938-01-05 | 1939-01-05 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2239149A (en:Method) |
| BE (1) | BE431992A (en:Method) |
| FR (1) | FR848489A (en:Method) |
| GB (1) | GB525402A (en:Method) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2433700A (en) * | 1943-11-04 | 1947-12-30 | Farnsworth Res Corp | Phototube multiplier |
-
1938
- 1938-01-05 US US183420A patent/US2239149A/en not_active Expired - Lifetime
- 1938-12-22 GB GB37271/38A patent/GB525402A/en not_active Expired
-
1939
- 1939-01-05 BE BE431992D patent/BE431992A/xx unknown
- 1939-01-05 FR FR848489D patent/FR848489A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR848489A (fr) | 1939-10-31 |
| GB525402A (en) | 1940-08-28 |
| US2239149A (en) | 1941-04-22 |