Granted Patent
Utility
US 5,120,589 · App. 07/614,116
Composite cards
Inventors:
Masaki Morikawa, Naoyuki Hosoda, Naoki Uchiyama
Patented Case
View Patent ↗
Granted: Jun 9, 1992
Filed: Nov 16, 1990
Inventors
Masaki Morikawa
Naoyuki Hosoda
Naoki Uchiyama
Assignee (at issue)
MITSUBISHI MATERIALS CORPORATION
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.