Granted Patent
Utility
US 5,662,943 · App. 08/641,772
Fabrication methods and equipment for granulated powders
Inventors:
Osamu Yamashita, Tsunekazu Saigo, Seiichi Kohara, Hirokazu Kitayama, Hiroshi Hashikawa
Patented Case
View Patent ↗
Granted: Sep 2, 1997
Filed: Apr 30, 1996
Inventors
Osamu Yamashita
Tsunekazu Saigo
Seiichi Kohara
Hirokazu Kitayama
Hiroshi Hashikawa
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.