Granted Patent
Utility
US 4,356,613 · App. 06/254,519
Key top for automatic assembly for keyboard apparatus
Inventor:
Edward I. Nelson
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Apr 15, 1981
Inventor
Edward I. Nelson
Assignee (at issue)
Burroughs, 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.