Granted Patent
Utility
US 6,793,810 · App. 10/148,080
Waste water treatment apparatus
Inventor:
Toshihiro Takahashi
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: May 28, 2002
Inventor
Toshihiro Takahashi
Assignee (at issue)
Aoki Electric Ind. 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.