Granted Patent
Utility
US 5,293,286 · App. 08/022,871
Magnetic disc apparatus for maintaining an optimum humidity in a head disc assembly
Inventors:
Akihoro Hasegawa, Yoshihiro Terada, Takashi Koshiyama, Hiroyuki Haruyama, Toshio Yasuda
Patented Case
View Patent ↗
Granted: Mar 8, 1994
Filed: Feb 25, 1993
Inventors
Akihoro Hasegawa
Yoshihiro Terada
Takashi Koshiyama
Hiroyuki Haruyama
Toshio Yasuda
Assignee (at issue)
NEC CORPORATION
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.