FR544381A - Dual Filament Incandescent Lamps - Google Patents

Dual Filament Incandescent Lamps

Info

Publication number
FR544381A
FR544381A FR544381DA FR544381A FR 544381 A FR544381 A FR 544381A FR 544381D A FR544381D A FR 544381DA FR 544381 A FR544381 A FR 544381A
Authority
FR
France
Prior art keywords
incandescent lamps
filament incandescent
dual filament
dual
lamps
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
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie des Lampes
Original Assignee
Compagnie des Lampes
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Compagnie des Lampes filed Critical Compagnie des Lampes
Application granted granted Critical
Publication of FR544381A publication Critical patent/FR544381A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
FR544381D 1921-08-17 1921-12-09 Dual Filament Incandescent Lamps Expired FR544381A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US492887A US1722180A (en) 1921-08-17 1921-08-17 Two-filament incandescent lamp

Publications (1)

Publication Number Publication Date
FR544381A true FR544381A (en) 1922-09-21

Family

ID=23958005

Family Applications (2)

Application Number Title Priority Date Filing Date
FR544381D Expired FR544381A (en) 1921-08-17 1921-12-09 Dual Filament Incandescent Lamps
FR26911D Expired FR26911E (en) 1921-08-17 1922-09-30 Dual Filament Incandescent Lamps

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR26911D Expired FR26911E (en) 1921-08-17 1922-09-30 Dual Filament Incandescent Lamps

Country Status (2)

Country Link
US (1) US1722180A (en)
FR (2) FR544381A (en)

Also Published As

Publication number Publication date
US1722180A (en) 1929-07-23
FR26911E (en) 1924-03-20

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