Granted Patent
Utility
US 4,799,764 · App. 07/137,421
Spectral image viewing device
Inventor:
Christopher S. Crowell
Patented Case
View Patent ↗
Granted: Jan 24, 1989
Filed: Dec 23, 1987
Inventor
Christopher S. Crowell
Assignee (at issue)
STRUCTURAL GRAPHICS, LLC
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.