Granted Patent
Utility
US 4,892,045 · App. 07/247,633
Condensate drain system
Inventor:
David Schumacher
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Sep 22, 1988
Inventor
David Schumacher
Assignee (at issue)
Snyder General Corporation
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.