Granted Patent
Utility
US 4,303,095 · App. 06/155,241
Low-differential pressure delay valve
Inventors:
John A. Aubel, William Hofmann Bose, James H. Burrows
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: Jun 2, 1980
Inventors
John A. Aubel
William Hofmann Bose
James H. Burrows
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.