Patents by Inventor Mark D. Krag

Mark D. Krag 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).

  • Device for cleaning teeth to prevent the formation of plaque
    Patent number: 4550741
    Abstract: Presented is a device utilizing a thread-like member for "flossing" teeth to dislodge and remove adherent material that may develop into plaque.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: November 5, 1985
    Assignee: Dental Preventech, Inc.
    Inventor: Mark D. Krag
  • Device for cleaning teeth to prevent the formation of plaque
    Patent number: 4315517
    Abstract: Presented is a device utilizing a thread-like member for "flossing" teeth to dislodge and remove adherent material that may develop into plaque.
    Type: Grant
    Filed: October 31, 1978
    Date of Patent: February 16, 1982
    Inventor: Mark D. Krag