CA221399A - Bifocal lens - Google Patents

Bifocal lens

Info

Publication number
CA221399A
CA221399A CA221399A CA221399DA CA221399A CA 221399 A CA221399 A CA 221399A CA 221399 A CA221399 A CA 221399A CA 221399D A CA221399D A CA 221399DA CA 221399 A CA221399 A CA 221399A
Authority
CA
Canada
Prior art keywords
bifocal lens
bifocal
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
CA221399A
Other languages
French (fr)
Inventor
W. Hill Harry
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 CA221399A publication Critical patent/CA221399A/en
Expired legal-status Critical Current

Links

CA221399A Bifocal lens Expired CA221399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA221399T

Publications (1)

Publication Number Publication Date
CA221399A true CA221399A (en) 1922-07-25

Family

ID=35117002

Family Applications (1)

Application Number Title Priority Date Filing Date
CA221399A Expired CA221399A (en) Bifocal lens

Country Status (1)

Country Link
CA (1) CA221399A (en)

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