Granted Patent
Utility
US 6,457,550 · App. 09/800,186
Weatherproof sound attenuating device
Inventors:
Charles L. Barry, David P. Leclerc, Thanh K. Tang, James L. Smith
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Mar 6, 2001
Inventors
Charles L. Barry
David P. Leclerc
Thanh K. Tang
James L. Smith
Assignee (at issue)
Twin City Fan Companies, Ltd.
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.