Granted Patent
Utility
US 6,656,416 · App. 09/946,962
Powder feeding apparatus, pressing apparatus using the same, powder feeding method and sintered magnet manufacturing method
Inventors:
Akira Nakamura, Atsuo Tanaka, Shouichi Matsugami, Tadahiro Iwasaki, Yoshiro Takano
Patented Case
View Patent ↗
Granted: Dec 2, 2003
Filed: Sep 6, 2001
Inventors
Akira Nakamura
Atsuo Tanaka
Shouichi Matsugami
Tadahiro Iwasaki
Yoshiro Takano
Assignee (at issue)
Sumitomo Special Metals 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.