Granted Patent
Utility
US 4,040,760 · App. 05/649,267
Direction-indicating surface marking apparatus for roadways and the like
Inventor:
Charles W. Wyckoff
Patented Case
View Patent ↗
Granted: Aug 9, 1977
Filed: Jan 15, 1976
Inventor
Charles W. Wyckoff
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.