Granted Patent
Utility
US 6,066,194 · App. 09/062,201
Electronic room air cleaner with variable speed motor
Inventors:
Gordon Jeffrey Hugghins, Robert W. Helt
Patented Case
View Patent ↗
Granted: May 23, 2000
Filed: Apr 17, 1998
Inventors
Gordon Jeffrey Hugghins
Robert W. Helt
Assignee (at issue)
American Standard Inc.
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.