Granted Patent
Utility
US 4,511,090 · App. 06/485,029
Material spreader
Inventor:
Paul Morgan
Patented Case
View Patent ↗
Granted: Apr 16, 1985
Filed: Apr 14, 1983
Inventor
Paul Morgan
Assignee (at issue)
Lakeshore Equipment & Supply Co.
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.