Granted Patent
Utility
US 5,094,260 · App. 07/603,502
Proportional valve and pressure control system
Inventors:
John Michael Stuart, Michael Peterson
Patented Case
View Patent ↗
Granted: Mar 10, 1992
Filed: Oct 26, 1990
Inventors
John Michael Stuart
Michael Peterson
Assignee (at issue)
Alcon Surgical, 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.