CA217976A - Lens - Google Patents

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Info

Publication number
CA217976A
CA217976A CA217976A CA217976DA CA217976A CA 217976 A CA217976 A CA 217976A CA 217976 A CA217976 A CA 217976A CA 217976D A CA217976D A CA 217976DA CA 217976 A CA217976 A CA 217976A
Authority
CA
Canada
Prior art keywords
lens
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
CA217976A
Other languages
French (fr)
Inventor
H. Parsons Harold
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.)
American Optical Corp
Original Assignee
American Optical Corp
Publication date
Application granted granted Critical
Publication of CA217976A publication Critical patent/CA217976A/en
Expired legal-status Critical Current

Links

CA217976A Lens Expired CA217976A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA217976T

Publications (1)

Publication Number Publication Date
CA217976A true CA217976A (en) 1922-04-25

Family

ID=35112420

Family Applications (1)

Application Number Title Priority Date Filing Date
CA217976A Expired CA217976A (en) Lens

Country Status (1)

Country Link
CA (1) CA217976A (en)

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