Patents by Inventor Lane Gehrig

Lane Gehrig 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).

  • Method for molding ear cushions
    Patent number: 4260575
    Abstract: Ear cushions for headphones are formed from an open cell polyurethane foam material. An ear cushion blank is cut from the material and compressed to a desired shape between a holder and a forming tool. Heated air is forced through the porous material to set it to a contoured shape. The molding process can be performed quickly without damaging the cellular structure.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: April 7, 1981
    Assignee: Koss Corporation
    Inventors: Donald G. Thew, Lane Gehrig