Inventor
HISHI WAKICHIRO
JP6 patents
Patents
6 patentsUS4880474ANov 14, 1989
Method and apparatus for operating vacuum cleaner
HITACHI LTD125 citations96
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
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
US5075607ADec 24, 1991
Method and apparatus for operating vacuum cleaner
HITACHI LTD10 citations73