Patents by Inventor Samuel H. Doppelt

Samuel H. Doppelt 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).

  • Bone biopsy apparatus
    Patent number: 4798213
    Abstract: Apparatus for obtaining a bone biopsy comprising a trocar which includes a guide tube with gripping teeth at one end and a tubular drill which is insertable through the tube. The drill has cutting teeth at its forward end and comprises an outer retaining sheath and an inner retaining sheath which is slidable axially within the outer retaining sheath. The inner retaining sheath consists of two separable longitudinal halves which separate when the inner retaining sheath is removed from the outer retaining sheath by means of an elongated extractor.
    Type: Grant
    Filed: September 9, 1987
    Date of Patent: January 17, 1989
    Inventor: Samuel H. Doppelt