Granted Patent
Utility
US 4,520,772 · App. 06/585,494
Fuel shut-off valve for internal combustion engines
Inventors:
William A. Scott, Roger N. Smith
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: Mar 2, 1984
Inventors
William A. Scott
Roger N. Smith
Assignee (at issue)
WALBRO LLC
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.