Patents by Inventor Mark Allen Irwin

Mark Allen Irwin 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).

  • Single-piece sandwich frame clipboard apparatus
    Patent number: 5887902
    Abstract: A clipboard apparatus comprising a single sheet of plastic folded over to form two planar surfaces which allow the insertion of reference material into the sandwiched area formed between the two planar surfaces of said folded plastic sheet so as to protect said reference material from surrounding adverse elements. The clipboard apparatus further includes a clip assembly, attached to the planar surface at or near the fold, for securing a piece of paper to the outside smooth surface of the clipboard for writing, or drawing, on the surface.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: March 30, 1999
    Inventors: Mark Allen Irwin, Craig Allen Hunter