Patents by Inventor Duane E. Harrington

Duane E. Harrington 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).

  • Cat box litter screening device
    Patent number: 4312295
    Abstract: A liner for use in a litter box or tray for cats, which is of conventional design having sides and a bottom, the liner having a plurality of flexible sieve sheets overlying a flexible impervious sheet, sheets being removeably attached to an underlying semi-rigid support, and being of such size as to overlap the sides of the litter box, the support having an attachment device for attaching the support to the bottom of the litter box, such that when litter is placed in the box over the liner packet, the sieve sheets are periodically removed to remove fecal matter by screening and aerating the litter, and lastly the impervious sheet is removed to remove and discard the litter before replacement with a new liner packet and new litter whereby the period over which litter is usable is substantially extended.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: January 26, 1982
    Inventor: Duane E. Harrington
  • Paper wiring apparatus
    Patent number: 4259140
    Abstract: A process and apparatus for attaching a wire to a paper including a paper feed mechanism for feeding paper across a fabrication station, a wire feed mechanism coordinated with the paper feed mechanism for feeding wire across the fabrication station in conjunction with the paper, an applicator for applying glue to the wire and a joining mechanism for joining the wire to the paper.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: March 31, 1981
    Inventor: Duane E. Harrington
  • D Bite lite
    Patent number: 4250649
    Abstract: An attachment for a fishing rod, the attachment including a case secured to a fishing rod clamp, the containing a battery and lamp in circuit with a switch that is tripped closed by a pivotable lever having a loop on its end through which the fishing line extends, so that when a fish bites on a bait and tugs on the line, the lamp is lighted.
    Type: Grant
    Filed: January 15, 1979
    Date of Patent: February 17, 1981
    Inventors: Duane E. Harrington, George Spector
  • Paper wiring transport apparatus and process
    Patent number: 4242170
    Abstract: A process and apparatus for attaching a wire to a paper including a paper feed mechanism for feeding paper across a fabrication station, a wire feed mechanism coordinated with the paper feed mechanism for feeding wire across the fabrication station in conjunction with the paper, an applicator for applying glue to the wire and a joining mechanism for joining the wire to the paper.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: December 30, 1980
    Assignee: Duane E. Harrington
    Inventors: Duane E. Harrington, Merritt A. Robinson
  • Integral cigarette paper holder element
    Patent number: RE30558
    Abstract: Cigarette paper with an integral support for holding a cigarette that has been consumed in substantial part, comprising a deformable wire incorporated longitudinally along the length of the paper containing the smoking medium, the wire being exposed for manipulation into a finger supported holder for the remainder of the cigarette.
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: March 31, 1981
    Inventor: Duane E. Harrington