Granted Patent
Utility
US 4,751,451 · App. 06/783,431
Fan motor control system
Inventor:
David Vincent
Patented Case
View Patent ↗
Granted: Jun 14, 1988
Filed: Oct 3, 1985
Inventor
David Vincent
Assignee (at issue)
Vent-Axia 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.