FR742873A - - Google Patents
Info
- Publication number
- FR742873A FR742873A FR742873DA FR742873A FR 742873 A FR742873 A FR 742873A FR 742873D A FR742873D A FR 742873DA FR 742873 A FR742873 A FR 742873A
- 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
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/28—Non-electron-emitting electrodes; Screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0013—Sealed electrodes
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR742873A true FR742873A (it) | 1933-03-18 |
Family
ID=1547214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR742873D Expired FR742873A (it) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR742873A (it) |
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0
- FR FR742873D patent/FR742873A/fr not_active Expired