Granted Patent
Utility
US 5,448,494 · App. 08/180,498
Mask data processing apparatus for integrated circuit production
Inventors:
Kenichi Kobayashi, Masahiro Yumoto, Nobuyasu Horiuchi, Akihiro Okazaki, Hiroshi Fuji, Hiroaki Tsuda
Patented Case
View Patent ↗
Granted: Sep 5, 1995
Filed: Jan 12, 1994
Inventors
Kenichi Kobayashi
Masahiro Yumoto
Nobuyasu Horiuchi
Akihiro Okazaki
Hiroshi Fuji
Hiroaki Tsuda
Assignees (at issue)
Fujitsu Limited
Japan Control Systems, 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.