Granted Patent
Utility
US 4,744,734 · App. 07/075,386
Means for controlling air discharge, in an air compressor
Inventor:
Brian D. Sowards
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Jul 20, 1987
Inventor
Brian D. Sowards
Assignee (at issue)
Ingersoll-Rand Company
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.