Granted Patent
Utility
US 3,975,830 · App. 05/604,329
Centering tool
Inventor:
Edwin Francis Lopacki
Patented Case
View Patent ↗
Granted: Aug 24, 1976
Filed: Aug 13, 1975
Inventor
Edwin Francis Lopacki
Assignee (at issue)
B. F. Goodrich Company
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.