Granted Patent
Utility
US 5,709,807 · App. 08/745,897
Flow rate adjusting for rotary nozzle type molten metal pouring unit
Inventor:
Tetsuya Yoshihara
Patented Case
View Patent ↗
Granted: Jan 20, 1998
Filed: Nov 7, 1996
Inventor
Tetsuya Yoshihara
Assignees (at issue)
NKK Co., Ltd.
Tokyo Yogyo Kabushiki Kaisha
Nippon Rotary Nozzle Co., Ltd.
Kokan Kikai 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.