Granted Patent
Utility
US 6,319,647 · App. 09/520,360
Toner and developer for magnetic brush development system
Inventors:
Edward J. Gutman, Barbara Ferguson
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Mar 7, 2000
Inventors
Edward J. Gutman
Barbara Ferguson
Assignee (at issue)
Xerox 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.