Patents by Inventor Robert J. Lefler

Robert J. Lefler 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).

  • Portable mattress support
    Patent number: 4196483
    Abstract: A portable mattress support adapted to be readily installed and removed from a confined space and especially in a tractor cab sleeping quarter area, whereby the support permits the absorption of various forces without imparting the same to the user.
    Type: Grant
    Filed: July 19, 1978
    Date of Patent: April 8, 1980
    Inventors: Robert J. Lefler, George H. Kahl, Jr., Thomas E. Waldrop