Granted Patent
Utility
US 4,515,012 · App. 06/555,091
Valve testing system utilizing an artificial atmosphere
Inventors:
Patrick A. Jenkins, Donald A. Ferguson
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Nov 25, 1983
Inventors
Patrick A. Jenkins
Donald A. Ferguson
Assignee (at issue)
BorgWarner 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.