Granted Patent
Utility
US 5,803,444 · App. 08/812,004
Coiled wave spring and production method thereof
Inventors:
Minoru Shibuya, Masayoshi Shimoseki, Minoru Sawayama, Seiichi Inukai
Patented Case
View Patent ↗
Granted: Sep 8, 1998
Filed: Mar 5, 1997
Inventors
Minoru Shibuya
Masayoshi Shimoseki
Minoru Sawayama
Seiichi Inukai
Assignees (at issue)
MITSUBISHI STEEL MFG. CO., LTD.
MITSUBISHI JIDOSHA KOGYO 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.