Patents by Inventor Ernest F. J. Prinzhorn

Ernest F. J. Prinzhorn 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: D266844
    Type: Grant
    Filed: November 7, 1980
    Date of Patent: November 9, 1982
    Assignee: QRS Corporation
    Inventor: Ernest F. J. Prinzhorn
  • Patent number: D283937
    Type: Grant
    Filed: December 1, 1983
    Date of Patent: May 20, 1986
    Assignee: ORS Corporation
    Inventor: Ernest F. J. Prinzhorn
  • Patent number: D286098
    Type: Grant
    Filed: November 17, 1983
    Date of Patent: October 7, 1986
    Assignee: QRS Corporation
    Inventor: Ernest F. J. Prinzhorn
  • Patent number: D288011
    Type: Grant
    Filed: October 11, 1985
    Date of Patent: January 27, 1987
    Inventor: Ernest F. J. Prinzhorn
  • Patent number: D289215
    Type: Grant
    Filed: October 11, 1985
    Date of Patent: April 7, 1987
    Assignee: QRS Corporation
    Inventor: Ernest F. J. Prinzhorn
  • Patent number: D293150
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: December 8, 1987
    Assignee: QRS Corporation
    Inventor: Ernest F. J. Prinzhorn
  • Patent number: D293151
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: December 8, 1987
    Assignee: QRS Corporation
    Inventor: Ernest F. J. Prinzhorn
  • Patent number: D293152
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: December 8, 1987
    Assignee: QRS Corporation
    Inventor: Ernest F. J. Prinzhorn
  • Patent number: D293269
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: December 15, 1987
    Assignee: QRS Corporation
    Inventor: Ernest F. J. Prinzhorn
  • Patent number: D293844
    Type: Grant
    Filed: May 13, 1985
    Date of Patent: January 19, 1988
    Assignee: QRS Corporation
    Inventor: Ernest F. J. Prinzhorn