FR674001A - - Google Patents
Info
- Publication number
- FR674001A FR674001A FR674001DA FR674001A FR 674001 A FR674001 A FR 674001A FR 674001D A FR674001D A FR 674001DA FR 674001 A FR674001 A FR 674001A
- 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
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
- H01J9/042—Manufacture, activation of the emissive part
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT551533X | 1928-06-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR674001A true FR674001A (ko) | 1930-02-24 |
Family
ID=3676467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR674001D Expired FR674001A (ko) | 1928-06-08 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE360249A (ko) |
| DE (1) | DE551533C (ko) |
| FR (1) | FR674001A (ko) |
-
0
- FR FR674001D patent/FR674001A/fr not_active Expired
- BE BE360249D patent/BE360249A/xx unknown
-
1929
- 1929-04-20 DE DEV25191D patent/DE551533C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE360249A (ko) | |
| DE551533C (de) | 1932-06-01 |