Granted Patent
Utility
US 4,930,551 · App. 07/367,206
Automatic hot water recovery apparatus
Inventor:
Spencer Kim Haws
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Jun 16, 1989
Inventor
Spencer Kim Haws
Assignee (at issue)
Alternative Energy Resources, 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.