Granted Patent
Utility
US 4,777,483 · App. 06/811,520
Solid state rotary entry control system
Inventor:
Daniel L. Fowler
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Dec 20, 1985
Inventor
Daniel L. Fowler
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.