Granted Patent
Utility
US 6,015,265 · App. 09/143,607
Box fan with air divider ring
Inventors:
William E. Lasko, Ralph Zwakenberg, Rodney Wilson
Patented Case
View Patent ↗
Granted: Jan 18, 2000
Filed: Aug 31, 1998
Inventors
William E. Lasko
Ralph Zwakenberg
Rodney Wilson
Assignee (at issue)
LASKO HOLDINGS, 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.