CA122563A - Manufacture of bi-focal lenses - Google Patents

Manufacture of bi-focal lenses

Info

Publication number
CA122563A
CA122563A CA000122563A CA122563DA CA122563A CA 122563 A CA122563 A CA 122563A CA 000122563 A CA000122563 A CA 000122563A CA 122563D A CA122563D A CA 122563DA CA 122563 A CA122563 A CA 122563A
Authority
CA
Canada
Prior art keywords
manufacture
focal lenses
lenses
focal
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
CA000122563A
Other languages
French (fr)
Inventor
Malcolm Bentzon
Alfred Henry Emerson 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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of CA122563A publication Critical patent/CA122563A/en
Expired legal-status Critical Current

Links

CA000122563A 1907-03-28 1907-03-28 Manufacture of bi-focal lenses Expired CA122563A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA122563T 1907-03-28

Publications (1)

Publication Number Publication Date
CA122563A true CA122563A (en) 1909-12-14

Family

ID=45242287

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000122563A Expired CA122563A (en) 1907-03-28 1907-03-28 Manufacture of bi-focal lenses

Country Status (1)

Country Link
CA (1) CA122563A (en)

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