Granted Patent
Utility
US 4,690,096 · App. 06/944,895
Magnetic brush development apparatus having a gating and metering mechanism
Inventors:
Frank Hacknauer, Salvatore C. DeFazio, Richard S. Fox
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Dec 22, 1986
Inventors
Frank Hacknauer
Salvatore C. DeFazio
Richard S. Fox
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.