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FR442176A - Improvements in electric lamps - Google Patents

Improvements in electric lamps

Info

Publication number
FR442176A
FR442176A FR442176A FR442176DA FR442176A FR 442176 A FR442176 A FR 442176A FR 442176 A FR442176 A FR 442176A FR 442176D A FR442176D A FR 442176DA FR 442176 A FR442176 A FR 442176A
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
FR442176A
Other languages
French (fr)
Inventor
Peter Cooper Hewitt
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR442176A publication Critical patent/FR442176A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/30—Envelopes; Vessels incorporating lenses
FR442176A 1911-04-08 1912-04-04 Improvements in electric lamps Expired FR442176A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US442176XA 1911-04-08 1911-04-08

Publications (1)

Publication Number Publication Date
FR442176A true FR442176A (en) 1912-08-26

Family

ID=32596972

Family Applications (1)

Application Number Title Priority Date Filing Date
FR442176A Expired FR442176A (en) 1911-04-08 1912-04-04 Improvements in electric lamps

Country Status (3)

Country Link
DE (2) DE280693C (en)
FR (1) FR442176A (en)
GB (1) GB191208086A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL249365A (en) * 1959-03-26
DE1123395B (en) * 1959-11-05 1962-02-08 Hans Joachim Lindner Dr Ing Light with multiple bulbs
US11158768B2 (en) 2004-05-07 2021-10-26 Bruce H. Baretz Vacuum light emitting diode
JP2008529950A (en) * 2005-02-18 2008-08-07 エージーシー フラット グラス ユーロップ エスエー Method for selective etching of glass article surfaces

Also Published As

Publication number Publication date
DE273432C (en)
GB191208086A (en) 1912-10-24
DE280693C (en)

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