Granted Patent
Utility
US 5,081,339 · App. 07/531,813
Water bed heater
Inventor:
Clifford R. Stine
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: Jun 1, 1990
Inventor
Clifford R. Stine
Assignee (at issue)
Sunbeam Corporation Limited
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.