Granted Patent
Utility
US 4,956,549 · App. 07/218,168
Optical sensing systems
Inventors:
Michael L. Henning, Christopher Lamb
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Jul 13, 1988
Inventors
Michael L. Henning
Christopher Lamb
Assignee (at issue)
Plessey Overseas 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.