Granted Patent
Utility
US 4,907,874 · App. 07/228,465
Detection and display device
Inventor:
DuWain K. Ake
Patented Case
View Patent ↗
Granted: Mar 13, 1990
Filed: Aug 5, 1988
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.