FR690300A - Improvements to vacuum tubes - Google Patents

Improvements to vacuum tubes

Info

Publication number
FR690300A
FR690300A FR690300DA FR690300A FR 690300 A FR690300 A FR 690300A FR 690300D A FR690300D A FR 690300DA FR 690300 A FR690300 A FR 690300A
Authority
FR
France
Prior art keywords
vacuum tubes
tubes
vacuum
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.)
Arcturus Radio Tube Co
Original Assignee
Arcturus Radio Tube Co
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 Arcturus Radio Tube Co filed Critical Arcturus Radio Tube Co
Application granted granted Critical
Publication of FR690300A publication Critical patent/FR690300A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/02—Tubes with a single discharge path
FR690300D 1930-02-20 1930-02-20 Improvements to vacuum tubes Expired FR690300A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR690300T 1930-02-20

Publications (1)

Publication Number Publication Date
FR690300A true FR690300A (en) 1930-09-18

Family

ID=9028821

Family Applications (1)

Application Number Title Priority Date Filing Date
FR690300D Expired FR690300A (en) 1930-02-20 1930-02-20 Improvements to vacuum tubes

Country Status (1)

Country Link
FR (1) FR690300A (en)

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