Granted Patent
Utility
US 5,392,149 · App. 07/963,549
Polygonal mirror optical scanning system
Inventors:
John D. Boardman, James R. Boyd, Jeffrey P. Welch
Patented Case
View Patent ↗
Granted: Feb 21, 1995
Filed: Oct 20, 1992
Inventors
John D. Boardman
James R. Boyd
Jeffrey P. Welch
Assignee (at issue)
E-Systems, Inc.
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.