Granted Patent
Utility
US 4,890,344 · App. 07/304,172
Air control system for air bed
Inventor:
Robert A. Walker
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Jan 31, 1989
Inventor
Robert A. Walker
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.