Patents by Inventor John Harper

John Harper 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: 4094611
    Abstract: Means are disclosed for securing together a first, U-shaped member and a second member received within the first member. In the preferred embodiment, the second member is a holder for a mineral cutter pick and the U-shaped member is formed on a drum or cutter chain of a mining machine. The means comprise registering bores in the legs of the U-shaped member and in the second member, one of the members being formed with a recess extending transversely from the bore therein. A hollow cross pin is received within the bores and a locking pin is driven through a transverse bore in the cross pin to extend into said recess. The cross pin has a length equal to or less than said bores in registration, and part of its internal surface is provided with a screw thread.
    Type: Grant
    Filed: March 25, 1977
    Date of Patent: June 13, 1978
    Assignee: Austin Hoy and Company, Ltd.
    Inventors: John A. Harper, Terence V. Williams
  • Patent number: 3948126
    Abstract: A method and apparatus of producing continuous, cross-perforated, snap-out business forms and the like consisting of a plurality of properly aligned, superimposed sheets in which the interval between crossperforation lines may be varied with a minimum of "downtime" to provide business forms of diverse sizes while maintaining a uniform fold interval for stacking the continuous sheets one on top of the other into a pack.
    Type: Grant
    Filed: December 11, 1974
    Date of Patent: April 6, 1976
    Assignee: Service Business Forms, Inc.
    Inventors: Larry B. Wolfberg, John Harper