Patents by Inventor John R. Schwerin

John R. Schwerin 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).

  • Cover for rodent trap
    Patent number: D346199
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: April 19, 1994
    Assignee: Bell Laboratories, Inc.
    Inventors: Cisse W. Spragins, John R. Schwerin, Richard J. Ray