Granted Patent
Utility
US 4,973,933 · App. 07/484,345
Dual control infinite switch
Inventor:
Joseph C. Kadlubowski
Patented Case
View Patent ↗
Granted: Nov 27, 1990
Filed: Feb 22, 1990
Inventor
Joseph C. Kadlubowski
Assignee (at issue)
Harper-Wyman 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.