Granted Patent
Utility
US 4,855,206 · App. 07/229,382
Rare earth containing magnetic carrier particles
Inventor:
Bijay S. Saha
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Aug 5, 1988
Inventor
Bijay S. Saha
Assignee (at issue)
EASTMAN KODAK COMPANY
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.