Granted Patent
Utility
US 4,904,246 · App. 07/221,384
Cannula assembly
Inventor:
Robert W. Atkinson
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Jul 19, 1988
Inventor
Robert W. Atkinson
Assignee (at issue)
Snyder 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.