Patents by Inventor Francis R. Struewing, deceased

Francis R. Struewing, deceased 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).

  • Box spring assembly
    Patent number: 4057860
    Abstract: A box spring assembly for use as a supporting foundation for a bed mattress. The assembly comprises a wooden frame, slats, spiral springs, edge coil springs, a border wire and a welded wire top grid. The spiral springs extend transverse to the wooden slats and alternate revolutions of the spiral springs are secured to the slats. At the top, the spiral springs are supported by the welded wire grid. Side edge reinforcement and resiliency is provided by coil springs, each of which is secured at the bottom to the wooden frame and at the top to the border wire and grid.
    Type: Grant
    Filed: October 10, 1975
    Date of Patent: November 15, 1977
    Assignee: Leggett & Platt, Incorporated
    Inventors: Larry Higgins, John Thomas King, Blondie Butler, Francis R. Struewing, deceased
  • Box spring assembly
    Patent number: 4012801
    Abstract: A box spring assembly for use as a foundation for a bed mattress. The assembly comprises a wooden frame, slats, spiral springs, corner coil springs, a border wire, and a welded wire top grid. The spiral springs extend parallel to the wooden slats and are secured at the bottom to the slats and at the top to the welded wire grid. Corner reinforcement and resiliency is provided by four corner coil springs, each of which is secured at the bottom to the wooden frame and at the top to the border wire and grid.
    Type: Grant
    Filed: October 10, 1975
    Date of Patent: March 22, 1977
    Assignee: Legget & Platt Incorporated
    Inventors: John Thomas King, Blondie Butler, Francis R. Struewing, deceased