Granted Patent
Utility
US 4,393,389 · App. 06/228,526
Magnetic toner transfer method and apparatus
Inventors:
Houshang Rasekhi, Alfred M. Nelson
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Jan 26, 1981
Inventors
Houshang Rasekhi
Alfred M. Nelson
Assignee (at issue)
Wang Laboratories, 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.