NL29677C - - Google Patents
Info
- Publication number
- NL29677C NL29677C NL29677DA NL29677C NL 29677 C NL29677 C NL 29677C NL 29677D A NL29677D A NL 29677DA NL 29677 C NL29677 C NL 29677C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/15—Cathodes heated directly by an electric current
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE306513X | 1928-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL29677C true NL29677C (en:Method) |
Family
ID=6121154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL29677D NL29677C (en:Method) | 1928-02-22 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1839323A (en:Method) |
| BE (1) | BE358360A (en:Method) |
| FR (1) | FR670129A (en:Method) |
| GB (1) | GB306513A (en:Method) |
| NL (1) | NL29677C (en:Method) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2734144A (en) * | 1956-02-07 | hoover |
-
0
- NL NL29677D patent/NL29677C/xx active
- BE BE358360D patent/BE358360A/xx unknown
-
1929
- 1929-02-19 US US341143A patent/US1839323A/en not_active Expired - Lifetime
- 1929-02-22 GB GB5837/29A patent/GB306513A/en not_active Expired
- 1929-02-22 FR FR670129D patent/FR670129A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE358360A (en:Method) | |
| FR670129A (fr) | 1929-11-25 |
| US1839323A (en) | 1932-01-05 |
| GB306513A (en) | 1930-06-23 |