Patents by Inventor Joseph Kehl

Joseph Kehl 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).

  • Process for making a cellulose triacetate photographic film base
    Patent number: 5688455
    Abstract: A method of making a cellulose triacetate photographic film support by forming a dope solution of cellulose triacetate in a first solvent, passing the dope solution under pressure through a sheet forming die zone having an upper and lower surface and two edge surfaces, injecting a second solvent into the dope solution at the edge surfaces within the die zone in an amount sufficient to form a slip layer at the two edge surfaces, exiting the dope solution from the sheet forming die zone and separating the solvent from the cellulose triacetate.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: November 18, 1997
    Assignee: Eastman Kodak Company
    Inventors: Randall Joseph Kehl, Eric Eugene Arrington
  • Seat belt microphone
    Patent number: D310082
    Type: Grant
    Filed: October 26, 1987
    Date of Patent: August 21, 1990
    Assignee: Shure Brothers, Inc.
    Inventors: Joseph Kehl, Hari Matsuda