Patents by Inventor Lawrence Lewison

Lawrence Lewison has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Manufacture of soft contact lenses having vent passageways
    Patent number: 4353849
    Abstract: In connection with the heretofore commonly molded soft corneal contact lens, a substitute manufacturing method is used so as to embody the lens with air vent configurations which effectively resist flattening during use, the referred to substitute method including forming impressions in the lens construction material in the locations of the air vents which increases the density in the walls bounding the air vents so that these walls do not collapse, or flatten, during use.
    Type: Grant
    Filed: June 19, 1981
    Date of Patent: October 12, 1982
    Inventor: Lawrence Lewison