Granted Patent
Utility
US 4,791,494 · App. 06/605,977
Multiple variable light source printer
Inventor:
Louis F. Schaefer
Patented Case
View Patent ↗
Granted: Dec 13, 1988
Filed: Apr 30, 1984
Inventor
Louis F. Schaefer
Assignee (at issue)
Savin Corporation
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.