Granted Patent
Utility
US 4,986,604 · App. 07/307,816
Roadway grooving apparatus
Inventor:
Donald F. Meister
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Feb 7, 1989
Inventor
Donald F. Meister
Assignee (at issue)
Target Products 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.