CA115903A - Manufacture of bi-focal lenses - Google Patents

Manufacture of bi-focal lenses

Info

Publication number
CA115903A
CA115903A CA000115903A CA115903DA CA115903A CA 115903 A CA115903 A CA 115903A CA 000115903 A CA000115903 A CA 000115903A CA 115903D A CA115903D A CA 115903DA CA 115903 A CA115903 A CA 115903A
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
CA000115903A
Other languages
French (fr)
Inventor
Harold J. Stead
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 CA115903A publication Critical patent/CA115903A/en
Expired legal-status Critical Current

Links

CA000115903A 1908-05-29 1908-05-29 Manufacture of bi-focal lenses Expired CA115903A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA115903T 1908-05-29

Publications (1)

Publication Number Publication Date
CA115903A true CA115903A (en) 1908-12-29

Family

ID=45235628

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000115903A Expired CA115903A (en) 1908-05-29 1908-05-29 Manufacture of bi-focal lenses

Country Status (1)

Country Link
CA (1) CA115903A (en)

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