Granted Patent
Utility
US 5,189,486 · App. 07/657,096
Echelle polychromator
Inventors:
Stefan Florek, Helmut Becker-Ross
Patented Case
View Patent ↗
Granted: Feb 23, 1993
Filed: Feb 15, 1991
Inventors
Stefan Florek
Helmut Becker-Ross
Assignee (at issue)
Zentralinstitut fur Optik und Spektroskopie
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.