Patents by Inventor Carl Bistrack

Carl Bistrack 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: 6036385
    Abstract: An instrument holder, which may be separate from or integral with the instrument for persons with or without physical disabilities. A central bore enables insertion of instruments of varying shapes. Gripping surfaces include a compound bevel downward and with a decided right or left hand slope. Elements from a top palm rest to the lower planar surface are volute, forming a right or left hand spiral. At the rear, the palm rest curves aft and under terminating in the bevelled vertical detente. The hand specific side forms a concave surface sufficient to accommodate fingers, joints, knuckles, or hand webbing between finger joints, flaring outward joining the lower planar surface. From the upper rear bevel detente, the back forms a slightly convex surface connecting with the bottom. The body and instrument path is reversible exposing the larger circumference area of the palm rest along with other control surfaces.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: March 14, 2000
    Inventor: Carl Bistrack
  • Patent number: 5626430
    Abstract: A held writing instrument holder for persons with or without physical disabilities. A central bore with several flat slits enables insertion of instruments of varying shapes. One version has an hour glass-shaped body with a truncated periphery forming a gripping surface with a curved concave surface portion enabling a variety of grips to accommodate the user.
    Type: Grant
    Filed: May 3, 1994
    Date of Patent: May 6, 1997
    Inventor: Carl Bistrack
  • Patent number: 5180239
    Abstract: A hand held adaptable pressure writing instrument holder for those persons with physical writing disabilities. The one piece unit is formed of a resilient material and contains a central core instrument path consisting of a circular bore hole with several flat slits enabling the insertion of a variety of instruments and adaptation to varying shapes. The body consists of a palm rest of oval egg shape which curves forward and under terminating in a perpendicular planar surface projection of sufficient size to allow for finger placement on this upper shelf. A vertical gripping surface connects the upper shelf to another lower perpendicular planar surface in parallel with the first. The planar surfaces include a compound bevel downward and with a decided right or left hand slope. The elements from the top palm rest to the lower planar surface are volute in nature forming a right or left-hand spiral. At the rear of the device, the palm rest curves aft and under terminating in the beveled vertical detent.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: January 19, 1993
    Inventor: Carl Bistrack
  • Patent number: D396057
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: July 14, 1998
    Inventor: Carl Bistrack