FR681710A - Electric discharge tubes - Google Patents

Electric discharge tubes

Info

Publication number
FR681710A
FR681710A FR681710DA FR681710A FR 681710 A FR681710 A FR 681710A FR 681710D A FR681710D A FR 681710DA FR 681710 A FR681710 A FR 681710A
Authority
FR
France
Prior art keywords
electric discharge
discharge tubes
tubes
electric
discharge
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR681710A publication Critical patent/FR681710A/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
FR681710D 1928-10-02 1929-09-12 Electric discharge tubes Expired FR681710A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL681710X 1928-10-02

Publications (1)

Publication Number Publication Date
FR681710A true FR681710A (en) 1930-05-19

Family

ID=19805284

Family Applications (1)

Application Number Title Priority Date Filing Date
FR681710D Expired FR681710A (en) 1928-10-02 1929-09-12 Electric discharge tubes

Country Status (2)

Country Link
BE (1) BE363695A (en)
FR (1) FR681710A (en)

Also Published As

Publication number Publication date
BE363695A (en)

Similar Documents

Publication Publication Date Title
FR674313A (en) Electric discharge tube
FR686234A (en) Electric discharge tube
FR686414A (en) Electric discharge tube
FR669314A (en) Electric discharge tube
FR649051A (en) Electric discharge tube
FR45132E (en) Electric discharge tube
FR685521A (en) Electric discharge tube
FR668025A (en) Electric discharge tube
FR672469A (en) Electric discharge tubes
FR717583A (en) Electric discharge tube
FR723374A (en) Electric discharge tube
FR665991A (en) Electric discharge tube
FR674565A (en) Electric discharge tube
FR727891A (en) Electric discharge tube
FR669389A (en) Electric discharge tubes
FR681710A (en) Electric discharge tubes
FR676301A (en) Electric discharge tubes
FR718745A (en) Gas-filled electric discharge tube
FR675409A (en) Electric discharge tube
FR682098A (en) Electric discharge tube
FR674890A (en) Electric discharge tube
FR674486A (en) Electric discharge tube
FR658896A (en) Electric discharge tube
FR642557A (en) Electric discharge tube
FR679499A (en) Electric discharge tubes