Granted Patent
Utility
US 4,750,477 · App. 07/017,813
Instrument control head
Inventor:
John Wardle
Patented Case
View Patent ↗
Granted: Jun 14, 1988
Filed: Feb 20, 1987
Inventor
John Wardle
Assignee (at issue)
Circon Corporation
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.