Granted Patent
Utility
US 6,241,829 · App. 09/457,551
Silicon steel sheet and method thereof
Inventors:
Koichiro Fujita, Yasushi Tanaka, Hironori Ninomiya, Tatsuhiko Hiratani, Shoji Kasai
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Dec 9, 1999
Inventors
Koichiro Fujita
Yasushi Tanaka
Hironori Ninomiya
Tatsuhiko Hiratani
Shoji Kasai
Assignee (at issue)
NKK 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.