Patents by Inventor Donald B. Mitchell

Donald B. Mitchell 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).

  • Patent number: 5346268
    Abstract: This invention is directed to a tool comprising a pair of hand grasping juxtapositioned rods which are clamped together for movement under spring bias one relative to the other. A pair of heads are mounted one on each of the common ends of the rods for grasping therebetween the grid of a barbecue grill.
    Type: Grant
    Filed: November 12, 1993
    Date of Patent: September 13, 1994
    Inventors: Lester H. Baker, Donald B. Mitchell
  • Patent number: 4780974
    Abstract: A tag assembly for use on offset printers comprising a sheet formed of a number of separable parts with each detached part forming a shipping tag. The tags are arranged in pairs extending along the longitudinal axis of the sheet, with the tags of each pair being arranged in side-by-side abutting arrangement, their abutting edges forming a perforated line. The top edges of the first pair of tags forms the top of the sheet, and the bottom edges of the second pair of tags forms the bottom of the sheet. The top edges of the second pair of tags are connected to the bottom edges of the first pair of tags along a perforated line. Each tag is provided with a reinforced hole along its top edge, leaving the bottom of the sheet uncluttered for gripping by the offset printer.
    Type: Grant
    Filed: January 9, 1987
    Date of Patent: November 1, 1988
    Inventor: Donald B. Mitchell
  • Patent number: 4505449
    Abstract: An expanded foam core such as a polystyrene foam board is covered on only its sides and top with a fiberglass reinforced cementitious material to form a solid base. Heavy steel coils can be embedded in the composite for receiving steel posts which serve to mount air conditioners or the like. Alternatively, a recess can be formed in the composition for use as a transformer pad.
    Type: Grant
    Filed: February 22, 1980
    Date of Patent: March 19, 1985
    Assignee: Diversitech Corporation
    Inventors: George S. Turner, Donald B. Mitchell
  • Patent number: D267397
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: December 28, 1982
    Inventor: Donald B. Mitchell