Granted Patent
Utility
US 5,865,592 · App. 08/468,266
Stone metering system for railroad track maintenance vehicle
Inventor:
Kevin A. Hansen
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Jun 6, 1995
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.