Granted Patent
Utility
US 4,288,487 · App. 06/023,087
Method of forming surface markings on roadway areas, and roadway areas produced thereby
Inventor:
Ludwig Eigenmann
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Mar 22, 1979
Inventor
Ludwig Eigenmann
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.