Granted Patent
Utility
US 4,494,908 · App. 06/468,244
Tangential blower
Inventor:
Reinhold Hopfensperger
Patented Case
View Patent ↗
Granted: Jan 22, 1985
Filed: Feb 22, 1983
Inventor
Reinhold Hopfensperger
Assignee (at issue)
International Standard Electric Corporation
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.