Granted Patent
Utility
US 6,679,821 · App. 09/679,810
Centrifugal separator and administration of user and actual operation of the same
Inventors:
Satoshi Numata, Noriyasu Matsufuji, Hisanobu Oyama, Mitsutoshi Yotsuyanagi, Kazuyoshi Tokunaga, Kahoru Takahashi
Patented Case
View Patent ↗
Granted: Jan 20, 2004
Filed: Oct 5, 2000
Inventors
Satoshi Numata
Noriyasu Matsufuji
Hisanobu Oyama
Mitsutoshi Yotsuyanagi
Kazuyoshi Tokunaga
Kahoru Takahashi
Assignee (at issue)
Hitachi Koko 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.