Granted Patent
Utility
US 4,833,464 · App. 07/096,037
Electrophoretic information display (EPID) apparatus employing grey scale capability
Inventors:
Frank J. Di Santo, Denis A. Krusos, Edward Lewit
Patented Case
View Patent ↗
Granted: May 23, 1989
Filed: Sep 14, 1987
Inventors
Frank J. Di Santo
Denis A. Krusos
Edward Lewit
Assignee (at issue)
Copytele, Inc.
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.