Granted Patent
Utility
US 5,868,522 · App. 08/783,434
Vibratory screed assembly for an asphalt paving machine
Inventor:
Thomas R. Campbell
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Jan 16, 1997
Inventor
Thomas R. Campbell
Assignee (at issue)
Astec Industries, 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.