GB190616839A - Improvements in the Manufacture of Bi-focal Lenses. - Google Patents

Improvements in the Manufacture of Bi-focal Lenses.

Info

Publication number
GB190616839A
GB190616839A GB190616839DA GB190616839A GB 190616839 A GB190616839 A GB 190616839A GB 190616839D A GB190616839D A GB 190616839DA GB 190616839 A GB190616839 A GB 190616839A
Authority
GB
United Kingdom
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
Inventor
David Cowan
Samuel Cowan
Alexander Cowan
Thomas Cowan
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 GB190616839A publication Critical patent/GB190616839A/en
Expired legal-status Critical Current

Links

GB190616839D 1906-07-26 1906-07-26 Improvements in the Manufacture of Bi-focal Lenses. Expired GB190616839A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190616839T 1906-07-26

Publications (1)

Publication Number Publication Date
GB190616839A true GB190616839A (en) 1907-05-02

Family

ID=35252407

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190616839D Expired GB190616839A (en) 1906-07-26 1906-07-26 Improvements in the Manufacture of Bi-focal Lenses.

Country Status (1)

Country Link
GB (1) GB190616839A (en)

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