Patents by Inventor Colin F. Chisholm

Colin F. Chisholm 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 floss holder
    Patent number: D244540
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: May 31, 1977
    Inventors: Joseph C. Dennesen, Colin F. Chisholm
  • Dental floss holder
    Patent number: D244541
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: May 31, 1977
    Inventors: Joseph C. Dennesen, Colin F. Chisholm