Granted Patent
Utility
US 5,083,839 · App. 07/544,602
Apparatus for grooving or grinding pavement
Inventor:
Rick Younger
Patented Case
View Patent ↗
Granted: Jan 28, 1992
Filed: Jun 27, 1990
Inventor
Rick Younger
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.