Granted Patent
Utility
US 5,505,689 · App. 08/328,387
Propertioneal mechanical retraction apparatus
Inventors:
Thomas A. Kramer, Albert K. Chin
Patented Case
View Patent ↗
Granted: Apr 9, 1996
Filed: Oct 24, 1994
Inventors
Thomas A. Kramer
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.