Granted Patent
Utility
US 4,892,425 · App. 07/139,826
Thermal transfer recording apparatus and ink sheet cassette therefor
Inventors:
Hiroshi Shimizu, Naohiro Ozawa, Toshihiko Gotoh, Kentaro Hamma, Takeshi Nomura
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Dec 30, 1987
Inventors
Hiroshi Shimizu
Naohiro Ozawa
Toshihiko Gotoh
Kentaro Hamma
Takeshi Nomura
Assignee (at issue)
HITACHI, 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.