Granted Patent
Utility
US 4,574,171 · App. 06/637,266
Keyboard auxiliary bearing
Inventor:
Ronald S. Denley
Patented Case
View Patent ↗
Granted: Mar 4, 1986
Filed: Aug 3, 1984
Inventor
Ronald S. Denley
Assignee (at issue)
Oak Industries Inc.
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.