FR610601A - Improvements in lenses - Google Patents

Improvements in lenses

Info

Publication number
FR610601A
FR610601A FR610601DA FR610601A FR 610601 A FR610601 A FR 610601A FR 610601D A FR610601D A FR 610601DA FR 610601 A FR610601 A FR 610601A
Authority
FR
France
Prior art keywords
lenses
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
Other languages
French (fr)
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.)
UK Optical Co Ltd
Original Assignee
UK Optical Co Ltd
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 UK Optical Co Ltd filed Critical UK Optical Co Ltd
Application granted granted Critical
Publication of FR610601A publication Critical patent/FR610601A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR610601D 1925-04-29 1926-02-04 Improvements in lenses Expired FR610601A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB610601X 1925-04-29

Publications (1)

Publication Number Publication Date
FR610601A true FR610601A (en) 1926-09-09

Family

ID=10486552

Family Applications (1)

Application Number Title Priority Date Filing Date
FR610601D Expired FR610601A (en) 1925-04-29 1926-02-04 Improvements in lenses

Country Status (1)

Country Link
FR (1) FR610601A (en)

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