NL131903C - - Google Patents
Info
- Publication number
- NL131903C NL131903C NL131903DA NL131903C NL 131903 C NL131903 C NL 131903C NL 131903D A NL131903D A NL 131903DA NL 131903 C NL131903 C NL 131903C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K7/00—Lamps for purposes other than general lighting
- H01K7/02—Lamps for purposes other than general lighting for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/26—Screens; Filters
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US701563A US2994799A (en) | 1957-12-09 | 1957-12-09 | Projection lamp |
| US701414A US2979634A (en) | 1957-12-09 | 1957-12-09 | Projection lamp |
| US707952A US2980818A (en) | 1958-01-09 | 1958-01-09 | Projection lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL131903C true NL131903C (en:Method) |
Family
ID=27418723
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL131903D NL131903C (en:Method) | 1957-12-09 | ||
| NL6600543A NL6600543A (en:Method) | 1957-12-09 | 1966-01-14 | |
| NL6600542A NL6600542A (en:Method) | 1957-12-09 | 1966-01-14 |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6600543A NL6600543A (en:Method) | 1957-12-09 | 1966-01-14 | |
| NL6600542A NL6600542A (en:Method) | 1957-12-09 | 1966-01-14 |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1276927B (en:Method) |
| NL (3) | NL6600543A (en:Method) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE271443C (en:Method) * | ||||
| AT9231B (de) * | 1900-04-21 | 1902-09-25 | Samuel Dexter Waschburn | Glühlampe mit im Inneren der Birne angeordnetem Reflector. |
| US1790086A (en) * | 1925-11-06 | 1931-01-27 | Edward W Boerstler | Apparatus for projecting light rays |
| DE456203C (de) * | 1926-12-09 | 1928-02-17 | Patra Patent Treuhand | Innenreflektor fuer elektrische Gluehlampen |
| US1961964A (en) * | 1927-12-05 | 1934-06-05 | Adiel Y Dodge | Electric lamp |
| US1936854A (en) * | 1932-04-12 | 1933-11-28 | Rogers Radio Tubes Ltd | Incandescent lamp |
| AT155704B (de) * | 1936-03-14 | 1939-03-10 | Andor Von Dani | Elektrische Glühlampe mit Innenreflektor. |
| FR895877A (fr) * | 1943-06-26 | 1945-02-06 | Lampe de projection | |
| US2795722A (en) * | 1954-12-29 | 1957-06-11 | Gen Electric | Electric incandescent lamp |
-
0
- NL NL131903D patent/NL131903C/xx active
-
1958
- 1958-12-09 DE DES60892A patent/DE1276927B/de active Pending
-
1966
- 1966-01-14 NL NL6600543A patent/NL6600543A/xx unknown
- 1966-01-14 NL NL6600542A patent/NL6600542A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL6600543A (en:Method) | 1966-04-25 |
| DE1276927B (de) | 1968-09-05 |
| NL6600542A (en:Method) | 1966-04-25 |