Granted Patent
Utility
US 4,356,609 · App. 06/215,911
Spindle keylock
Inventor:
Kenneth A. Wollermann
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Dec 12, 1980
Inventor
Kenneth A. Wollermann
Assignee (at issue)
Kearney & Trecker 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.