Inventor
ISHII YOSHITARO
JP24 patents
Patents
24 patentsUS5243732ASep 14, 1993
Vacuum cleaner with fuzzy logic control
HITACHI LTD142 citations97
US5110266AMay 5, 1992
Electric blower having improved return passage for discharged air flow
HITACHI LTD138 citations97
US4880474ANov 14, 1989
Method and apparatus for operating vacuum cleaner
HITACHI LTD125 citations96
US4446594AMay 8, 1984
Upright type electric cleaner
HITACHI LTD91 citations96
US5042844AAug 27, 1991
Hose fixture device
HITACHI LTD66 citations94
US5294872AMar 15, 1994
Method and apparatus for operating vacuum cleaner
HITACHI LTD25 citations92
US5166585ANov 24, 1992
Motor control apparatus for an electric vacuum cleaner
HITACHI LTD28 citations92
US5003663AApr 2, 1991
Upright-type electric vacuum cleaner
HITACHI LTD22 citations92
US4983895AJan 8, 1991
Method and apparatus for operating vacuum cleaner
HITACHI LTD25 citations92
US4958406ASep 25, 1990
Method and apparatus for operating vacuum cleaner
HITACHI LTD41 citations92
US4905341AMar 6, 1990
Upright-type electric vacuum cleaner
HITACHI LTD31 citations92
US4809394AMar 7, 1989
Vacuum cleaner having a blower facility structure
HITACHI LTD54 citations92
US5381584AJan 17, 1995
Vacuum cleaner
HITACHI LTD27 citations91
US5216778AJun 8, 1993
Vacuum cleaner
HITACHI LTD48 citations91
US4912593AMar 27, 1990
Electrical appliance
HITACHI LTD20 citations81
US4955105ASep 11, 1990
Vacuum cleaner
HITACHI LTD20 citations78
US6549731B1Apr 15, 2003
Image forming apparatus
HITACHI LTD8 citations74
US4893376AJan 16, 1990
Upright-type electric vacuum cleaner
HITACHI LTD11 citations74
US5075607ADec 24, 1991
Method and apparatus for operating vacuum cleaner
HITACHI LTD10 citations73
US5155885AOct 20, 1992
Vacuum cleaner and method for operating the same
HITACHI LTD12 citations70
US6125250ASep 26, 2000
Developing device, developing method, and an image forming apparatus
HITACHI LTD12 citations69
US5027469AJul 2, 1991
Vacuum cleaner
HITACHI LTD9 citations69
US6661994B2Dec 9, 2003
Electrophotographic image forming system
HITACHI LTD6 citations61
USD302878SAug 15, 1989
Electric vacuum cleaner
HITACHI LTD1 citations51