Granted Patent
Utility
US 5,695,832 · App. 08/464,545
Method of forming a hard-carbon-film-coated substrate
Inventors:
Hitoshi Hirano, Keiichi Kuramoto, Yoichi Domoto, Seiichi Kiyama
Patented Case
View Patent ↗
Granted: Dec 9, 1997
Filed: Jun 5, 1995
Inventors
Hitoshi Hirano
Keiichi Kuramoto
Yoichi Domoto
Seiichi Kiyama
Assignee (at issue)
SANYO ELECTRIC CO., 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.