Granted Patent
Utility
US 4,772,254 · App. 06/937,264
Centrifuge
Inventors:
Alfred Grassl, Erhard Knorr
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Dec 3, 1986
Inventors
Alfred Grassl
Erhard Knorr
Assignee (at issue)
Kontron Holding A.G.
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.