Granted Patent
Utility
US 5,330,669 · App. 08/041,016
Magnetic coating formulations
Inventors:
Masahiko Yasuda, Shigeo Hosokawa, Yorozu Yokomori, Shinichiro Jimbo, Edmond G. Kolycheck
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: Mar 31, 1993
Inventors
Masahiko Yasuda
Shigeo Hosokawa
Yorozu Yokomori
Shinichiro Jimbo
Edmond G. Kolycheck
Assignees (at issue)
KYOWA HAKKO KOGYO CO., LTD.
B. F. Goodrich Company
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.