Granted Patent
Utility
US 4,662,818 · App. 06/819,472
Tangential blower
Inventors:
Reinhold Hopfensperger, Dieter Schmidt
Patented Case
View Patent ↗
Granted: May 5, 1987
Filed: Jan 15, 1986
Inventors
Reinhold Hopfensperger
Dieter Schmidt
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.