Granted Patent
Utility
US 5,493,420 · App. 07/479,299
Dot density conversion method and system
Inventors:
Hideki Kuwamoto, Tadashi Kuwabara, Shigeyuki Taguchi, Hitoshi Tamura, Keiichi Nakane
Patented Case
View Patent ↗
Granted: Feb 20, 1996
Filed: Feb 13, 1990
Inventors
Hideki Kuwamoto
Tadashi Kuwabara
Shigeyuki Taguchi
Hitoshi Tamura
Keiichi Nakane
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.