Patents by Inventor John Sheahon

John Sheahon 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: 4961430
    Abstract: A biopsy punch for extracting cervical tissue comprises a tubular housing having a cutting means slidable therethrough for slicing a strip of tissue from the cervix tip protruding into a tissue port. Three embodiments are presented illustrating various cutting edges for the cutting means. The first embodiment presents a bevelled cutting edge with piercing point for initially piercing the tissue. A second embodiment presents a mounting block for the cutting edge with the block key locked to the housing in slidable movement therethrough. A third embodiment presents a cylindrical cutting edge for providing a conical slice of biopsy tissue.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: October 9, 1990
    Inventor: John Sheahon