NL44137C - - Google Patents
Info
- Publication number
- NL44137C NL44137C NL44137DA NL44137C NL 44137 C NL44137 C NL 44137C NL 44137D A NL44137D A NL 44137DA NL 44137 C NL44137 C NL 44137C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/02—Tubes in which one or a few electrodes are secondary-electron emitting electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
- H01J40/16—Photoelectric discharge tubes not involving the ionisation of a gas having photo- emissive cathode, e.g. alkaline photoelectric cell
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE426389X | 1934-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL44137C true NL44137C (da) |
Family
ID=6477182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL44137D NL44137C (da) | 1934-03-14 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2031331A (da) |
| FR (1) | FR786412A (da) |
| GB (1) | GB426389A (da) |
| NL (1) | NL44137C (da) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106941070A (zh) * | 2016-08-03 | 2017-07-11 | 成都青岗科技有限公司 | 一种球形紫外光电管 |
-
0
- NL NL44137D patent/NL44137C/xx active
-
1934
- 1934-12-04 GB GB34871/34A patent/GB426389A/en not_active Expired
-
1935
- 1935-02-28 FR FR786412D patent/FR786412A/fr not_active Expired
- 1935-03-13 US US10768A patent/US2031331A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR786412A (fr) | 1935-09-03 |
| GB426389A (en) | 1935-04-02 |
| US2031331A (en) | 1936-02-18 |