Patents by Inventor Richard Philip Cohan

Richard Philip Cohan 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: 3935640
    Abstract: A dental instrument comprising a metal shaft having a resilient extension at one end and a further functionally closely related instrument such as a periodontal probe or mirror at the other end. The resilient extension has two deformable surfaces which can be pressed against a tooth to test its mobility. The periodontal probe is color-coded, so that the depth to which the projection has been inserted into the gingival sulcus and any existing periodontal pocket is readily apparent to the dentist. The dental instrument can include a percussive hammer adjacent the resilient section.
    Type: Grant
    Filed: April 5, 1973
    Date of Patent: February 3, 1976
    Inventor: Richard Philip Cohan