Granted Patent
Utility
US 4,843,839 · App. 07/145,354
Positionable economizer
Inventor:
James A. Davis
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Jan 19, 1988
Inventor
James A. Davis
Assignee (at issue)
American Standard 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.