Granted Patent
Utility
US 5,179,412 · App. 07/789,887
Transfer unit for xerographic printing machine with constant ventilating interior
Inventors:
Masato Yamada, Junji Shirakawa, Kazuo Uno, Kimio Nakamura
Patented Case
View Patent ↗
Granted: Jan 12, 1993
Filed: Nov 12, 1991
Inventors
Masato Yamada
Junji Shirakawa
Kazuo Uno
Kimio Nakamura
Assignee (at issue)
Hitachi Koki Co., Ltd.
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.