CA228859A - Appareil a trouver le foyer de lampe - Google Patents

Appareil a trouver le foyer de lampe

Info

Publication number
CA228859A
CA228859A CA228859A CA228859DA CA228859A CA 228859 A CA228859 A CA 228859A CA 228859 A CA228859 A CA 228859A CA 228859D A CA228859D A CA 228859DA CA 228859 A CA228859 A CA 228859A
Authority
CA
Canada
Prior art keywords
light focusing
focusing apparatus
light
focusing
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
CA228859A
Other languages
English (en)
Inventor
Cromwell A. B. Halvorson, Jr.
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.)
General Electric Canada Co
Original Assignee
Canadian General Electric Co Ltd
Publication date
Application granted granted Critical
Publication of CA228859A publication Critical patent/CA228859A/fr
Expired legal-status Critical Current

Links

CA228859A Appareil a trouver le foyer de lampe Expired CA228859A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA228859T

Publications (1)

Publication Number Publication Date
CA228859A true CA228859A (fr) 1923-02-20

Family

ID=35126232

Family Applications (1)

Application Number Title Priority Date Filing Date
CA228859A Expired CA228859A (fr) Appareil a trouver le foyer de lampe

Country Status (1)

Country Link
CA (1) CA228859A (fr)

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