FR550201A - Improvements to electric lamps - Google Patents

Improvements to electric lamps

Info

Publication number
FR550201A
FR550201A FR550201DA FR550201A FR 550201 A FR550201 A FR 550201A FR 550201D A FR550201D A FR 550201DA FR 550201 A FR550201 A FR 550201A
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.)
Albert Degouy & Maublanc
Original Assignee
Albert Degouy & Maublanc
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 Albert Degouy & Maublanc filed Critical Albert Degouy & Maublanc
Application granted granted Critical
Publication of FR550201A publication Critical patent/FR550201A/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
    • H01K1/325—Reflecting coating
FR550201D 1922-04-14 1922-04-14 Improvements to electric lamps Expired FR550201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR550201T 1922-04-14

Publications (1)

Publication Number Publication Date
FR550201A true FR550201A (en) 1923-03-01

Family

ID=8936031

Family Applications (1)

Application Number Title Priority Date Filing Date
FR550201D Expired FR550201A (en) 1922-04-14 1922-04-14 Improvements to electric lamps

Country Status (1)

Country Link
FR (1) FR550201A (en)

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