Assignee
NIPPON FERROFLUIDICS KK
JP10 patents
Top patents by PatentIndex Score
US5394044AFeb 28, 1995
Magnetic bearing device
NIPPON FERROFLUIDICS KK23 citations92
US5092740AMar 3, 1992
Composite vacuum pump
NIPPON FERROFLUIDICS KK22 citations92
US4847526AJul 11, 1989
Variant-pole electric motor
NIPPON FERROFLUIDICS KK62 citations92
US5372432ADec 13, 1994
Dynamic pressure bearing assembly
NIPPON FERROFLUIDICS KK21 citations90
US5073737ADec 17, 1991
Magnetic bearing device
NIPPON FERROFLUIDICS KK7 citations73
US5068558ANov 26, 1991
Magnetic bearing device
NIPPON FERROFLUIDICS KK16 citations73
US5066879ANov 19, 1991
Single power source magnetic bearing device
NIPPON FERROFLUIDICS KK11 citations73
US5046151ASep 3, 1991
Magnetic bearing device
NIPPON FERROFLUIDICS KK7 citations73
US4955731ASep 11, 1990
Bearing equipment for vacuum devices
NIPPON FERROFLUIDICS KK3 citations62
US5052697AOct 1, 1991
Sealing member for ferrofluid seal and method of producing the same
NIPPON FERROFLUIDICS KK6 citations60