FR716156A - Improvements in photoelectric devices - Google Patents

Improvements in photoelectric devices

Info

Publication number
FR716156A
FR716156A FR716156DA FR716156A FR 716156 A FR716156 A FR 716156A FR 716156D A FR716156D A FR 716156DA FR 716156 A FR716156 A FR 716156A
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.)
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 FR716156A publication Critical patent/FR716156A/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
    • H01J40/16—Photoelectric discharge tubes not involving the ionisation of a gas having photo- emissive cathode, e.g. alkaline photoelectric cell
FR716156D 1930-05-10 1931-04-27 Improvements in photoelectric devices Expired FR716156A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL716156X 1930-05-10

Publications (1)

Publication Number Publication Date
FR716156A true FR716156A (en) 1931-12-16

Family

ID=19814960

Family Applications (1)

Application Number Title Priority Date Filing Date
FR716156D Expired FR716156A (en) 1930-05-10 1931-04-27 Improvements in photoelectric devices

Country Status (1)

Country Link
FR (1) FR716156A (en)

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