Granted Patent
Utility
US 6,374,749 · App. 09/414,368
Friction wedge for a railroad car truck having a replaceable wear member
Inventors:
Scott R. Duncan, Robert M. Irving, Valerian S. Skawinski
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Oct 7, 1999
Inventors
Scott R. Duncan
Robert M. Irving
Valerian S. Skawinski
Assignee (at issue)
NACO, Inc.
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.