Granted Patent
Utility
US 6,231,506 · App. 09/305,803
Method and apparatus for creating a working opening through an incision
Inventors:
Lawrence W. Hu, David J. Paul, Eugene E. Reis, Harry Leonard Green, II
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: May 4, 1999
Inventors
Lawrence W. Hu
David J. Paul
Eugene E. Reis
Harry Leonard Green, II
Assignee (at issue)
Cardiothoracic Systems, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.