Granted Patent
Utility
US 4,273,285 · App. 06/060,637
Weed spraying assembly
Inventor:
Sylvanus L. Scholbrock
Patented Case
View Patent ↗
Granted: Jun 16, 1981
Filed: Jul 25, 1979
Inventor
Sylvanus L. Scholbrock
Assignee (at issue)
EXCELLO CO., LTD.
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.