Granted Patent
Utility
US 4,537,385 · App. 06/434,291
Low emission valve
Inventors:
Duncan D. Bragg, Robert S. Wentworth
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Oct 14, 1982
Inventors
Duncan D. Bragg
Robert S. Wentworth
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.