Granted Patent
Utility
US 6,464,472 · App. 09/622,367
Circulation fan apparatus and circulation-fan driving motor
Inventors:
Shinichi Sekiguchi, Hiroyuki Shinozaki, Toshimitsu Barada, Toshiharu Nakazawa, Takeshi Kawamura
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Aug 16, 2000
Inventors
Shinichi Sekiguchi
Hiroyuki Shinozaki
Toshimitsu Barada
Toshiharu Nakazawa
Takeshi Kawamura
Assignees (at issue)
EBARA CORPORATION
KOMATSU 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.