Granted Patent
Utility
US 4,909,287 · App. 07/179,786
Fluid injection system
Inventors:
Harold R. Williams, Robert M. Spencer
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Apr 11, 1988
Inventors
Harold R. Williams
Robert M. Spencer
Assignee (at issue)
Surgikos, 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.