Granted Patent
Utility
US 6,000,868 · App. 08/923,666
Printer system with automatic ink ribbon cassette exchange function
Inventors:
Tadashi Watanabe, Yukio Shimizu, Hiroshi Takatani
Patented Case
View Patent ↗
Granted: Dec 14, 1999
Filed: Sep 4, 1997
Inventors
Tadashi Watanabe
Yukio Shimizu
Hiroshi Takatani
Assignee (at issue)
SHARP KABUSHIKI KAISHA
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.