FR742944A - - Google Patents
Info
- Publication number
- FR742944A FR742944A FR742944DA FR742944A FR 742944 A FR742944 A FR 742944A FR 742944D A FR742944D A FR 742944DA FR 742944 A FR742944 A FR 742944A
- 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)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE407373X | 1931-09-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR742944A true FR742944A (de) | 1933-03-18 |
Family
ID=6422168
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR742944D Expired FR742944A (de) | 1931-09-19 |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR742944A (de) |
| GB (1) | GB407373A (de) |
| NL (1) | NL40641C (de) |
-
0
- FR FR742944D patent/FR742944A/fr not_active Expired
- NL NL40641D patent/NL40641C/xx active
-
1932
- 1932-09-16 GB GB25765/32A patent/GB407373A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB407373A (en) | 1934-03-16 |
| NL40641C (de) |