Granted Patent
Utility
US 6,142,213 · App. 08/978,406
Ducted cooling system with radial-flow fan
Inventors:
William P. Gallivan, Peter A. Kershaw
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Nov 25, 1997
Inventors
William P. Gallivan
Peter A. Kershaw
Assignee (at issue)
Siemens Canada 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.