Granted Patent
Utility
US 5,647,868 · App. 08/430,294
Cryosurgical integrated control and monitoring system and method
Inventor:
Douglas O. Chinn
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Apr 28, 1995
Inventor
Douglas O. Chinn
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.