Patents by Inventor William Hackemann

William Hackemann 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).

  • Apparatus for cutting a continuous element of indeterminate length into predetermined lengths
    Patent number: RE29838
    Abstract: Apparatus for cutting a continuous .[.elements.]. .Iadd.element .Iaddend.of indeterminate length into predetermined lengths employs a pair of transversely spaced endless chains having a plurality of crossplates connected to and extending between the chains. Clamping means and cutting means are respectively mounted on the crossplates. A clamping cam is provided for actuating the clamping means and a cutting cam is provided for actuating the cutting means. The clamping means has a cam follower associated therewith which is cooperable with the clamping cam, and the cutting means has a cam follower associated therewith which is cooperable with the cutting cam.
    Type: Grant
    Filed: April 12, 1977
    Date of Patent: November 21, 1978
    Assignee: Hasbro Development Corp.
    Inventors: William Hackemann, Charles G. Renegar
  • Metric converter slide rule
    Patent number: D253114
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: October 9, 1979
    Assignee: Hasbro Industries, Inc.
    Inventor: William Hackemann
  • Metric converter slide rule
    Patent number: D253115
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: October 9, 1979
    Assignee: Hasbro Industries, Inc.
    Inventor: William Hackemann