Granted Patent
Utility
US 6,428,556 · App. 09/915,695
Longitudinal dilator and method
Inventor:
Albert K. Chin
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Jul 25, 2001
Inventor
Albert K. Chin
Assignee (at issue)
Origin Medsystems, 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.