FR577913A - - Google Patents
Info
- Publication number
- FR577913A FR577913A FR577913DA FR577913A FR 577913 A FR577913 A FR 577913A FR 577913D A FR577913D A FR 577913DA FR 577913 A FR577913 A FR 577913A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/28—Envelopes; Vessels
- H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
- H01K1/325—Reflecting coating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR577913A true FR577913A (ref) | 1924-08-12 |
Family
ID=1539465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR577913D Expired FR577913A (ref) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR577913A (ref) |
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0
- FR FR577913D patent/FR577913A/fr not_active Expired