Granted Patent
Utility
US 4,817,410 · App. 07/058,174
Roll for mill
Inventors:
Takashi Yatsuzuka, Tetsuya Ohba, Kouji Tanabe, Tatsuo Kojima, Tatsunobu Kobayashi, Kouki Katou
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Jun 4, 1987
Inventors
Takashi Yatsuzuka
Tetsuya Ohba
Kouji Tanabe
Tatsuo Kojima
Tatsunobu Kobayashi
Kouki Katou
Assignees (at issue)
Mitsubishi Kinzoku Kabushiki Kaisha
NIPPON STEEL 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.