Granted Patent
Utility
US 4,997,161 · App. 07/483,571
Fuel control system throttle valve unit therefor and methods of making the same
Inventors:
Donald W. Hutchison, Steven A. Kimmel, Raymond J. Bonkovich, James P. Chew, David Rath
Patented Case
View Patent ↗
Granted: Mar 5, 1991
Filed: Feb 22, 1990
Inventors
Donald W. Hutchison
Steven A. Kimmel
Raymond J. Bonkovich
James P. Chew
David Rath
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.