BE432879A - - Google Patents
Info
- Publication number
- BE432879A BE432879A BE432879DA BE432879A BE 432879 A BE432879 A BE 432879A BE 432879D A BE432879D A BE 432879DA BE 432879 A BE432879 A BE 432879A
- Authority
- BE
- Belgium
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
- H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes
- H01J9/125—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes of secondary emission electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/32—Secondary emission electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL208636X | 1938-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE432879A true BE432879A (en:Method) |
Family
ID=19778700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE432879D BE432879A (en:Method) | 1938-02-22 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE432879A (en:Method) |
| CH (1) | CH208636A (en:Method) |
| FR (1) | FR850654A (en:Method) |
| NL (1) | NL49428C (en:Method) |
-
0
- NL NL49428D patent/NL49428C/xx active
- BE BE432879D patent/BE432879A/xx unknown
-
1939
- 1939-02-21 CH CH208636D patent/CH208636A/de unknown
- 1939-02-21 FR FR850654D patent/FR850654A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL49428C (en:Method) | |
| FR850654A (fr) | 1939-12-22 |
| CH208636A (de) | 1940-02-15 |