FR679689A - - Google Patents
Info
- Publication number
- FR679689A FR679689A FR679689DA FR679689A FR 679689 A FR679689 A FR 679689A FR 679689D A FR679689D A FR 679689DA FR 679689 A FR679689 A FR 679689A
- 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
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE317800X | 1928-08-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR679689A true FR679689A (fr) | 1930-04-16 |
Family
ID=6150876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR679689D Expired FR679689A (fr) | 1928-08-22 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1872264A (fr) |
| FR (1) | FR679689A (fr) |
| GB (1) | GB317800A (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2514357A (en) * | 1946-06-22 | 1950-07-11 | Philco Corp | Permeability-tuned high-frequency amplifier |
-
0
- FR FR679689D patent/FR679689A/fr not_active Expired
-
1929
- 1929-08-22 GB GB25623/29A patent/GB317800A/en not_active Expired
- 1929-08-24 US US388153A patent/US1872264A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB317800A (en) | 1930-09-25 |
| US1872264A (en) | 1932-08-16 |