Granted Patent
Utility
US 6,589,703 · App. 09/853,412
Electrographic methods using hard magnetic carrier particles
Inventors:
Eric C. Stelter, Robert D. Fields, Thomas A. Jadwin
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: May 11, 2001
Inventors
Eric C. Stelter
Robert D. Fields
Thomas A. Jadwin
Assignee (at issue)
Heidelberger Druckmaschinen AG
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.