Granted Patent
Utility
US 4,857,735 · App. 07/113,230
Light emitting diode spectrophotometer
Inventor:
Hans G. Noller
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Oct 23, 1987
Inventor
Hans G. Noller
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.