Patents by Inventor Herman B. Mitchell

Herman B. Mitchell 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).

  • Dental syringe
    Patent number: D328643
    Type: Grant
    Filed: November 1, 1989
    Date of Patent: August 11, 1992
    Assignee: Confi-Dental Products Co.
    Inventor: Herman B. Mitchell
  • Dental syringe
    Patent number: D359560
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: June 20, 1995
    Assignee: Confi-Dental Products Co.
    Inventor: Herman B. Mitchell
  • Dental impression tray
    Patent number: D383845
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: September 16, 1997
    Assignee: Confi-Dental Products Company
    Inventors: Herman B. Mitchell, Sheldon M. Newman, Sharon A. Lutton