Granted Patent
Utility
US 5,139,509 · App. 07/398,581
Phacoemulsification system with handpiece simulator
Inventors:
Michael Fischer, Brian J. Kotowich
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Aug 25, 1989
Inventors
Michael Fischer
Brian J. Kotowich
Assignee (at issue)
Site Microsurgical Systems, 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.