Granted Patent
Utility
US 4,376,007 · App. 06/249,341
Machine for preparing road surfaces and forming traffic regulating lines thereon
Inventor:
Ludwig Eigenmann
Patented Case
View Patent ↗
Granted: Mar 8, 1983
Filed: Mar 31, 1981
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.