Granted Patent
Utility
US 5,644,396 · App. 08/492,661
Spectrograph with low focal ratio
Inventor:
George W. Hopkins, II
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Jun 20, 1995
Inventor
George W. Hopkins, II
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.