NL39929C - - Google Patents
Info
- Publication number
- NL39929C NL39929C NL39929DA NL39929C NL 39929 C NL39929 C NL 39929C NL 39929D A NL39929D A NL 39929DA NL 39929 C NL39929 C NL 39929C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/02—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies
- H01K9/06—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies with built-in device, e.g. switch, for automatically completing circuit of reserve body
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE434404X | 1934-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL39929C true NL39929C (en:Method) |
Family
ID=6505904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL39929D NL39929C (en:Method) | 1934-04-10 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2049338A (en:Method) |
| FR (1) | FR787061A (en:Method) |
| GB (1) | GB434404A (en:Method) |
| NL (1) | NL39929C (en:Method) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2448493A (en) * | 1946-08-30 | 1948-08-31 | Meno Stanley Joseph | Multiple life light bulb |
| US2518909A (en) * | 1947-12-13 | 1950-08-15 | Abraham Krakauer | Signal responsive to currentpassage time |
| US2607900A (en) * | 1949-11-03 | 1952-08-19 | Tung Sol Lamp Works Inc | Cathode-ray tube |
| US4580079A (en) * | 1980-08-11 | 1986-04-01 | Ronald Koo | Multifilament bulb with filament switching device |
| US4447760A (en) * | 1980-08-11 | 1984-05-08 | Ronald Koo | Filament switching device |
| US4382209A (en) * | 1980-10-06 | 1983-05-03 | General Electric Company | Thermal switch and dual filament long life lamp |
-
0
- NL NL39929D patent/NL39929C/xx active
-
1935
- 1935-03-12 US US10723A patent/US2049338A/en not_active Expired - Lifetime
- 1935-03-12 FR FR787061D patent/FR787061A/fr not_active Expired
- 1935-04-04 GB GB10493/35A patent/GB434404A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2049338A (en) | 1936-07-28 |
| FR787061A (fr) | 1935-09-16 |
| GB434404A (en) | 1935-08-30 |