FR633644A - Electric light tube - Google Patents

Electric light tube

Info

Publication number
FR633644A
FR633644A FR633644DA FR633644A FR 633644 A FR633644 A FR 633644A FR 633644D A FR633644D A FR 633644DA FR 633644 A FR633644 A FR 633644A
Authority
FR
France
Prior art keywords
electric light
light tube
tube
electric
light
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.)
Rovo A G
Original Assignee
Rovo A G
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 Rovo A G filed Critical Rovo A G
Application granted granted Critical
Publication of FR633644A publication Critical patent/FR633644A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/40—Devices for influencing the colour or wavelength of the light by light filters; by coloured coatings in or on the envelope
FR633644D 1926-04-30 1927-04-30 Electric light tube Expired FR633644A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE633644X 1926-04-30

Publications (1)

Publication Number Publication Date
FR633644A true FR633644A (en) 1928-02-01

Family

ID=6579152

Family Applications (1)

Application Number Title Priority Date Filing Date
FR633644D Expired FR633644A (en) 1926-04-30 1927-04-30 Electric light tube

Country Status (1)

Country Link
FR (1) FR633644A (en)

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