Granted Patent
Utility
US 4,057,892 · App. 05/710,460
Method of installing a water heater in a recreational vehicles
Inventor:
Donald M. White, III
Patented Case
View Patent ↗
Granted: Nov 15, 1977
Filed: Aug 2, 1976
Inventor
Donald M. White, III
Assignee (at issue)
Atwood Vacuum Machine 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.