Granted Patent
Utility
US 4,710,427 · App. 06/731,126
Process for treating magnetic metal power
Inventors:
Yasuhisa Yamauchi, Masao Asano, Hideyuki Anzai, Yoshitaka Yasufuku
Patented Case
View Patent ↗
Granted: Dec 1, 1987
Filed: May 6, 1985
Inventors
Yasuhisa Yamauchi
Masao Asano
Hideyuki Anzai
Yoshitaka Yasufuku
Assignee (at issue)
Konishiroku Photo Industry 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.