Patents by Inventor John C. Coffrin

John C. Coffrin 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: 4819568
    Abstract: A multi-way portable writing desk is formed of a unitary structure of generally U-shaped configuration consisting of a flat rectangular base panel for placement horizontally between the legs of the user and partially underlying the same or, horizontally beneath one leg of the user and to the side thereof, a right angle vertical riser panel having a lower end joined to one end of the base panel and extending vertically upward at right angles thereto and a lap panel integral with the upper end of the riser panel and extending parallel to the base panel, to the same side of the riser panel and overlying the base panel and being spaced from the base panel a distance capable of accommodating a leg or legs of the user whether the user straddles the vertical riser panel or the riser panel extends vertically upwardly along the outside of one of the legs of the user and the lap panel extends horizontally across the leg and overlies the lap of the user.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: April 11, 1989
    Inventor: John C. Coffrin