Patents by Inventor David R. Perrett

David R. Perrett 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).

  • Turn knob
    Patent number: D319381
    Type: Grant
    Filed: October 27, 1989
    Date of Patent: August 27, 1991
    Assignee: G. & S. Allgood (Holdings) Limited
    Inventors: Alan P. Tye, David R. Perrett, Simon D. E. Mills
  • Door pull
    Patent number: D320337
    Type: Grant
    Filed: October 27, 1989
    Date of Patent: October 1, 1991
    Assignee: G. & S. Allgood (Holdings) Limited
    Inventors: Alan P. Tye, David R. Perrett, Simon D. E. Mills
  • Lever handle
    Patent number: D323610
    Type: Grant
    Filed: October 27, 1989
    Date of Patent: February 4, 1992
    Assignee: G. & S. Allgood (Holdings) Limited
    Inventors: Alan P. Tye, David R. Perrett, Simon D. E. Mills