Contact lenses bearing identifying marks

US6024448A · kind A · utility

Assignee

• Johnson & Johnson Vision Products Inc. · US

Inventors

• Jongliang Wu · Jacksonville, US
• Khaled Chehab · Jacksonville, US
• Carl Crowe · Jacksonville, US
• Timothy R. Poling · Jacksonville, US
• Richard J. Nason · Roanoke, US
• Jon Walker · Lompoc, US
• Susan W. Neadle · Jacksonville, US
• Patricia Ann Hutfles · Jacksonville, US
• W. Anthony Martin · Orange Park, US

Key dates

• Filing date: Mar 31, 1998
• Grant date: Feb 15, 2000
• Expiry date: Mar 31, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41M5/267
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

This invention provides a contact lens comprising a front surface, a back surface and an identifying mark on at least one of said front surface and said back surface, wherein said identifying mark comprises a depressed region having a cross-section which comprises at least two intersecting concave surfaces at the bottom of said depressed region.