CA297819A - Appareil a fabriquer des lampes a vide - Google Patents

Appareil a fabriquer des lampes a vide

Info

Publication number
CA297819A
CA297819A CA297819A CA297819DA CA297819A CA 297819 A CA297819 A CA 297819A CA 297819 A CA297819 A CA 297819A CA 297819D A CA297819D A CA 297819DA CA 297819 A CA297819 A CA 297819A
Authority
CA
Canada
Prior art keywords
vacuum tubes
making vacuum
making
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
CA297819A
Other languages
English (en)
Inventor
H. Perryman George
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.)
PERRYMAN ELECTRIC CO
Original Assignee
PERRYMAN ELECTRIC CO
Publication date
Application granted granted Critical
Publication of CA297819A publication Critical patent/CA297819A/fr
Expired legal-status Critical Current

Links

CA297819A Appareil a fabriquer des lampes a vide Expired CA297819A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA297819T

Publications (1)

Publication Number Publication Date
CA297819A true CA297819A (fr) 1930-02-25

Family

ID=35235139

Family Applications (1)

Application Number Title Priority Date Filing Date
CA297819A Expired CA297819A (fr) Appareil a fabriquer des lampes a vide

Country Status (1)

Country Link
CA (1) CA297819A (fr)

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