US931571A - Bifocal lens. - Google Patents

Bifocal lens. Download PDF

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Publication number
US931571A
US931571A US44652508A US1908446525A US931571A US 931571 A US931571 A US 931571A US 44652508 A US44652508 A US 44652508A US 1908446525 A US1908446525 A US 1908446525A US 931571 A US931571 A US 931571A
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US
United States
Prior art keywords
bifocal lens
lens
bifocal
govelle
ocal
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 - Lifetime
Application number
US44652508A
Inventor
Albert E Covelle
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
Priority to US44652508A priority Critical patent/US931571A/en
Application granted granted Critical
Publication of US931571A publication Critical patent/US931571A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive

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  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)

Description

A. E. GOVELLE.
BIE'OCAL LENS. APPLICATION FILED AUG. a, 190s.
@tenter ug. l?, w09.
US44652508A 1908-08-03 1908-08-03 Bifocal lens. Expired - Lifetime US931571A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US44652508A US931571A (en) 1908-08-03 1908-08-03 Bifocal lens.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US44652508A US931571A (en) 1908-08-03 1908-08-03 Bifocal lens.

Publications (1)

Publication Number Publication Date
US931571A true US931571A (en) 1909-08-17

Family

ID=2999995

Family Applications (1)

Application Number Title Priority Date Filing Date
US44652508A Expired - Lifetime US931571A (en) 1908-08-03 1908-08-03 Bifocal lens.

Country Status (1)

Country Link
US (1) US931571A (en)

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