Granted Patent
Utility
US 4,980,683 · App. 07/431,406
Aircraft instrument systems
Inventors:
Peter O'Sullivan, Keith G. Dougan
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Nov 3, 1989
Inventors
Peter O'Sullivan
Keith G. Dougan
Assignee (at issue)
Smiths Industries Public Limited 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.