Patents by Inventor Arthur William Pratt

Arthur William Pratt 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).

  • Surgical apparatus
    Patent number: 5893862
    Abstract: Apparatus to remove tissue. The apparatus has an outer cannula and an inner cannula received within the outer cannula. The cannula are longitudinally movable relative to each other. There is an abutment at the end of one cannula to contact the other cannula. A drive permits advancing of the other cannula to contact the abutment whereby tissue between the other cannula and the abutment is removed. The invention finds particular application in removable of lens tissue from the eye of a human or other animal.
    Type: Grant
    Filed: April 10, 1997
    Date of Patent: April 13, 1999
    Inventors: Arthur William Pratt, Ian McDougall