Granted Patent
Utility
US 6,494,845 · App. 09/849,085
Retractable brush for use with endoscope for brush biopsy
Inventor:
Mark Rutenberg
Patented Case
View Patent ↗
Granted: Dec 17, 2002
Filed: May 4, 2001
Inventor
Mark Rutenberg
Assignee (at issue)
Oralscan Laboratories, 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.