Granted Patent
Utility
US 4,657,390 · App. 06/703,762
Universal spectrometer system having modular sampling chamber
Inventor:
Walter M. Doyle
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Feb 21, 1985
Inventor
Walter M. Doyle
Assignee (at issue)
Laser Precision Corp.
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.