Granted Patent
Utility
US 5,520,682 · App. 08/401,035
Cryosurgical instrument with vent means and method using same
Inventors:
John G. Baust, Zhaohua CHANG, J. J. Finkelstein
Patented Case
View Patent ↗
Granted: May 28, 1996
Filed: Mar 6, 1995
Inventors
John G. Baust
Zhaohua CHANG
J. J. Finkelstein
Assignee (at issue)
Cryomedical Sciences, 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.