FR550220A - Photoelectric devices - Google Patents

Photoelectric devices

Info

Publication number
FR550220A
FR550220A FR550220DA FR550220A FR 550220 A FR550220 A FR 550220A FR 550220D A FR550220D A FR 550220DA FR 550220 A FR550220 A FR 550220A
Authority
FR
France
Prior art keywords
photoelectric devices
photoelectric
devices
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 Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR550220A publication Critical patent/FR550220A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
    • H01J40/02—Details
    • H01J40/04—Electrodes
    • H01J40/06—Photo-emissive cathodes
FR550220D 1922-04-14 1922-04-14 Photoelectric devices Expired FR550220A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR550220T 1922-04-14

Publications (1)

Publication Number Publication Date
FR550220A true FR550220A (en) 1923-03-01

Family

ID=43259796

Family Applications (1)

Application Number Title Priority Date Filing Date
FR550220D Expired FR550220A (en) 1922-04-14 1922-04-14 Photoelectric devices

Country Status (1)

Country Link
FR (1) FR550220A (en)

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