Granted Patent
Utility
US 6,648,108 · App. 10/056,385
Sintered material for a magnetic track brake
Inventors:
Friedemann Grupp, Uwe Kroger, Eckart Saumweber, Wolfgang Schröer, Wolfgang Valentin
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Jan 24, 2002
Inventors
Friedemann Grupp
Uwe Kroger
Eckart Saumweber
Wolfgang Schröer
Wolfgang Valentin
Assignees (at issue)
AlliedSignal Bremsbelag GmbH
KNORR-BREMSE SYSTEME FÜR SCHIENENFAHRZEUGE GMBH
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.