Inventor
WATANABE SYUJI
JP12 patents
⚠️ This page may combine multiple inventors who share the name “WATANABE SYUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
11 patentsUS4880474ANov 14, 1989
Method and apparatus for operating vacuum cleaner
HITACHI LTD125 citations96
US4446594AMay 8, 1984
Upright type electric cleaner
HITACHI LTD91 citations96
US5144716ASep 8, 1992
Electric cleaner, method for producing same and mount base and bumper for electric cleaner
HITACHI LTD85 citations94
USD315624SMar 19, 1991
Electric vacuum cleaner
HITACHI LTD60 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
US5101534AApr 7, 1992
Suction nozzle with rotary brush for vacuum cleaner
HITACHI LTD51 citations92
US5054156AOct 8, 1991
Suction nozzle with rotary brush for vacuum cleaner
HITACHI LTD34 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