Granted Patent
Utility
US 4,357,103 · App. 06/247,977
Electrographic apparatus and method featuring compressed-field, magnetic brush development
Inventor:
Arthur S. Kroll
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Mar 27, 1981
Inventor
Arthur S. Kroll
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.