Granted Patent
Utility
US 5,584,641 · App. 08/249,742
Stone metering system for railroad track maintenance vehicle
Inventor:
Kevin A. Hansen
Patented Case
View Patent ↗
Granted: Dec 17, 1996
Filed: May 26, 1994
Inventor
Kevin A. Hansen
Assignee (at issue)
Pandrol Jackson, 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.