Granted Patent
Utility
US 4,252,228 · App. 06/028,693
Two-hand mechanical control device
Inventor:
Robert D. White
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Apr 10, 1979
Inventor
Robert D. White
Assignee (at issue)
Scovill 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.