Patents by Inventor John C. Strahan

John C. Strahan 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 cannula
    Patent number: 4655752
    Abstract: A surgical cannula having a first seal member having a substantially conical shape and an opening at the tip thereof, and a second seal member having a substantially conical shape and a slit at the tip thereof, whereby (a) when an instrument is inserted into the cannula, the instrument can pass through the first and second seal members into proximity with a surgical site located beneath the cannula, and fluid entering the cannula from the site will force the first seal member to close around the instrument and form a tight seal therewith so as to prohibit fluid from passing out of the cannula and (b) when no instrument is inserted into the cannula, fluid entering the cannula from the site will force the conical second seal member to close tightly on its slit and thereby form a tight seal so as to prohibit fluid from passing out of the cannula.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: April 7, 1987
    Assignee: Acufex Microsurgical, Inc.
    Inventors: George P. Honkanen, John C. Strahan, Philip R. Lichtman
  • Surgical cannula
    Patent number: D276649
    Type: Grant
    Filed: October 24, 1983
    Date of Patent: December 4, 1984
    Assignee: Acufex Microsurgical Inc.
    Inventors: George P. Honkanen, John C. Strahan, Philip R. Lichtman
  • Surgical obturator
    Patent number: D286438
    Type: Grant
    Filed: May 16, 1983
    Date of Patent: October 28, 1986
    Assignee: Acufex Microsurgical Inc.
    Inventors: Philip R. Lichtman, John C. Strahan
  • Surgical trocar
    Patent number: D286567
    Type: Grant
    Filed: May 16, 1983
    Date of Patent: November 4, 1986
    Assignee: Acufex Microsurgical Inc.
    Inventors: Philip R. Lichtman, John C. Strahan
  • Handle for surgical instrument
    Patent number: D289330
    Type: Grant
    Filed: February 9, 1984
    Date of Patent: April 14, 1987
    Assignee: Acufex Microsurgical Inc.
    Inventors: John C. Strahan, Philip R. Lichtman