Inventor
ISHIHARA TAMIO
JP13 patents
Patents
13 patentsUS6245224B1Jun 12, 2001
Water quality management system
HITACHI LTD94 citations97
US6444172B2Sep 3, 2002
Water quality meter and water quality monitoring system
HITACHI LTD40 citations96
US6290908B1Sep 18, 2001
Water quality meter and water monitoring system
HITACHI LTD47 citations96
US6398930B2Jun 4, 2002
Water quality meter and water quality monitoring system
HITACHI LTD28 citations92
US5526698AJun 18, 1996
Capacitance type electromagnetic flowmeter
HITACHI LTD24 citations92
US5469746ANov 28, 1995
Electromagnetic flow meter
HITACHI LTD53 citations92
US5307687AMay 3, 1994
Electromagnetic flowmeter
HITACHI LTD20 citations92
US5458003AOct 17, 1995
Electromagnetic flow meter
HITACHI LTD25 citations88
US4683480AJul 28, 1987
X-Y plotter drive roller arrangement
HITACHI LTD22 citations79
US5400659AMar 28, 1995
Electromagnetic flowmeter and manufacture method of same
HITACHI LTD14 citations73
USD319071SAug 13, 1991
Plotter
HITACHI LTD8 citations71
US4577409AMar 25, 1986
Pen changing apparatus for plotter
HITACHI LTD10 citations71
US4903045AFeb 20, 1990
X-Y plotter for non-perforated paper
HITACHI LTD9 citations66