Granted Patent
Utility
US 4,976,538 · App. 07/428,624
Detection and display device
Inventor:
DuWain K. Ake
Patented Case
View Patent ↗
Granted: Dec 11, 1990
Filed: Oct 30, 1989
Inventor
DuWain K. Ake
Assignee (at issue)
Spectra-Physics, Inc.
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.