Granted Patent
Utility
US 5,823,945 · App. 08/869,552
Endoscopic inflatable retraction device with additional inflatable chamber
Inventors:
Frederic H. Moll, Charles Gresl, Albert K. Chin, Philip K. Hopper
Patented Case
View Patent ↗
Granted: Oct 20, 1998
Filed: Jun 5, 1997
Inventors
Frederic H. Moll
Charles Gresl
Albert K. Chin
Philip K. Hopper
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.