Granted Patent
Utility
US 4,648,757 · App. 06/442,625
Precision adjustment system for boring tools
Inventor:
Harvey R. Plummer
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: Nov 18, 1982
Inventor
Harvey R. Plummer
Assignee (at issue)
AMCA International Corporation
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.