CA214150A - Lentille bifocale - Google Patents

Lentille bifocale

Info

Publication number
CA214150A
CA214150A CA214150A CA214150DA CA214150A CA 214150 A CA214150 A CA 214150A CA 214150 A CA214150 A CA 214150A CA 214150D A CA214150D A CA 214150DA CA 214150 A CA214150 A CA 214150A
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
CA214150A
Other languages
English (en)
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 CA214150A publication Critical patent/CA214150A/fr
Expired legal-status Critical Current

Links

CA214150A Lentille bifocale Expired CA214150A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA214150T

Publications (1)

Publication Number Publication Date
CA214150A true CA214150A (fr) 1921-11-08

Family

ID=35108594

Family Applications (1)

Application Number Title Priority Date Filing Date
CA214150A Expired CA214150A (fr) Lentille bifocale

Country Status (1)

Country Link
CA (1) CA214150A (fr)

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