Granted Patent
Utility
US 5,745,144 · App. 08/448,767
Field effect toning method
Inventor:
Orrin D. Christy
Patented Case
View Patent ↗
Granted: Apr 28, 1998
Filed: May 24, 1995
Inventor
Orrin D. Christy
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.