Granted Patent
Utility
US 6,118,239 · App. 09/197,880
Speed control drive circuit for blower motor
Inventor:
Andrew S. Kadah
Patented Case
View Patent ↗
Granted: Sep 12, 2000
Filed: Nov 23, 1998
Inventor
Andrew S. Kadah
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.