Granted Patent
Utility
US 4,469,288 · App. 06/470,142
Expansible shaft with actuator retaining member and spherical bearing surface
Inventor:
Virgil M. Pontes
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Feb 28, 1983
Inventor
Virgil M. Pontes
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.