Patents Assigned to NPD Technologies, Inc.
  • Soft contact lens with thin edge
    Patent number: 4153349
    Abstract: This invention relates to novel contact lenses, to a method of preparing the same, and to apparatus for carrying out the method of the invention.
    Type: Grant
    Filed: October 30, 1974
    Date of Patent: May 8, 1979
    Assignee: NPD Technologies, Inc.
    Inventor: Otto Wichterle