Granted Patent
Utility
US 4,519,620 · App. 06/475,900
Core chuck with resilient rollers
Inventor:
Robert D. Keith
Patented Case
View Patent ↗
Granted: May 28, 1985
Filed: Mar 16, 1983
Inventor
Robert D. Keith
Assignee (at issue)
DOUBLE E 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.