NL25471C - - Google Patents
Info
- Publication number
- NL25471C NL25471C NL25471DA NL25471C NL 25471 C NL25471 C NL 25471C NL 25471D A NL25471D A NL 25471DA NL 25471 C NL25471 C NL 25471C
- Authority
- NL
- Netherlands
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
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US758800A US1795730A (en) | 1924-12-30 | 1924-12-30 | Electron-emission device |
| US237001A US1838776A (en) | 1924-12-30 | 1927-12-01 | Method of making electron emission devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL25471C true NL25471C (xx) |
Family
ID=26930307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL25471D NL25471C (xx) | 1924-12-30 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1838776A (xx) |
| NL (1) | NL25471C (xx) |
-
0
- NL NL25471D patent/NL25471C/xx active
-
1927
- 1927-12-01 US US237001A patent/US1838776A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1838776A (en) | 1931-12-29 |