Patents Assigned to Keystone Products, Inc.
  • Spoke wheel anti-theft clip
    Patent number: 4061400
    Abstract: A device to hinder theft of decorative external wheel accessories. A resilient finger mounted on a holding member engages a projection extending from a bolt or nut to lock the holding bolt or nut in place.
    Type: Grant
    Filed: July 12, 1976
    Date of Patent: December 6, 1977
    Assignee: Keystone Products, Inc.
    Inventor: Robert A. D'Angelo
  • Wheel design
    Patent number: D250259
    Type: Grant
    Filed: October 5, 1977
    Date of Patent: November 14, 1978
    Assignee: Keystone Products, Inc.
    Inventor: Philip G. Patch
  • Vehicle wheel
    Patent number: D252146
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: June 19, 1979
    Assignee: Keystone Products, Inc.
    Inventor: Philip G. Patch
  • Automobile wheel
    Patent number: D256910
    Type: Grant
    Filed: July 13, 1979
    Date of Patent: September 16, 1980
    Assignee: Keystone Products, Inc.
    Inventor: Philip G. Patch