FR657886A - Advanced electric lamp - Google Patents
Advanced electric lampInfo
- Publication number
- FR657886A FR657886A FR657886DA FR657886A FR 657886 A FR657886 A FR 657886A FR 657886D A FR657886D A FR 657886DA FR 657886 A FR657886 A FR 657886A
- Authority
- FR
- France
- Prior art keywords
- electric lamp
- advanced electric
- advanced
- lamp
- electric
- Prior art date
- 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
- 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
- H01K9/04—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 manually operated switch
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR657886T | 1928-07-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR657886A true FR657886A (en) | 1929-05-28 |
Family
ID=9008722
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR657886D Expired FR657886A (en) | 1928-07-20 | 1928-07-20 | Advanced electric lamp |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR657886A (en) |
-
1928
- 1928-07-20 FR FR657886D patent/FR657886A/en not_active Expired
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