Patents by Inventor Walter B. Graham

Walter B. Graham 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).

  • Means for cutting squares
    Patent number: 3961552
    Abstract: A method and means for cutting or ruling squares is disclosed. The device comprises first and second flat guide members which are adapted to be positioned on the film halftone or diffusion transfer print. The first flat guide member comprises an elongated base portion and an elongated leg portion extending from one end of the base portion at a right angle thereto. The base and leg portions have inner guide edges formed thereon. The second flat guide member comprises an elongated base portion and an elongated leg portion extending from one end of the base portion at a right angle thereto. The base and leg portions of the second guide member have outer guide edges complementary to the inner guide edges of the first guide member. The base and leg portions of the second guide member also have inner guide edges provided thereon. The two guide members are used together to either rule or cut four perfect 90.degree. rules or cuts on four sides of the film halftone or diffusion transfer print.
    Type: Grant
    Filed: May 30, 1975
    Date of Patent: June 8, 1976
    Inventor: Walter B. Graham
  • Graphic arts blade
    Patent number: D258932
    Type: Grant
    Filed: May 3, 1978
    Date of Patent: April 21, 1981
    Inventor: Walter B. Graham