FR666208A - Improvements to electric lamps - Google Patents

Improvements to electric lamps

Info

Publication number
FR666208A
FR666208A FR666208DA FR666208A FR 666208 A FR666208 A FR 666208A FR 666208D A FR666208D A FR 666208DA FR 666208 A FR666208 A FR 666208A
Authority
FR
France
Prior art keywords
electric lamps
lamps
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
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 FR666208A publication Critical patent/FR666208A/en
Expired legal-status Critical Current

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
FR666208D 1927-12-06 1928-12-06 Improvements to electric lamps Expired FR666208A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US666208XA 1927-12-06 1927-12-06

Publications (1)

Publication Number Publication Date
FR666208A true FR666208A (en) 1929-09-28

Family

ID=22070648

Family Applications (1)

Application Number Title Priority Date Filing Date
FR666208D Expired FR666208A (en) 1927-12-06 1928-12-06 Improvements to electric lamps

Country Status (1)

Country Link
FR (1) FR666208A (en)

Similar Documents

Publication Publication Date Title
FR666208A (en) Improvements to electric lamps
FR675670A (en) Improvements to electric lamps
FR702878A (en) Improvements to electric lamps
FR633608A (en) Improvements to electric igniters
FR33874E (en) Improvements to electric filters
FR657760A (en) Improvements to electric filters
FR667658A (en) Improvements to electric filters
FR658149A (en) Improvements to electric cables
FR661674A (en) Improvements to lamps
FR660339A (en) Improvements to electric clocks
FR649543A (en) Improvements to electric lamps
FR660652A (en) Improvements made to electrical switches
FR629132A (en) Improvements to servo-brakes
FR677166A (en) Improvements to electric lamps
FR651170A (en) Improvements to electric lighters
FR652183A (en) Improvements to electric hoists
FR662134A (en) Improvements to dynamos
FR633565A (en) Improvements to electrical sockets
FR656369A (en) Improvement in electric lamps
FR656690A (en) Improvements to electric heaters
FR654510A (en) Improvements to electric heaters
FR646769A (en) Improvements to electric filters
FR662892A (en) Improvements to thermionic lamps
FR648357A (en) Improvements to thermionic lamps
FR648178A (en) Improvements to thermionic lamps