Inventor
Tunehiro Endo
Inventor
Hitachiota, JP
Overview
Patents· 11 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Pprimary
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters31%
A47LDomestic washing or cleaning19%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications13%
F04BPositive-displacement machines for liquids6%
F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids6%
F16CShafts6%
G11BInformation storage based on relative movement between record carrier and transducer6%
H01JElectric discharge tubes or discharge lamps6%
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems6%
PatentTitleYear
7,224,133'Control apparatus, dual chip inverter and single chip inverter of AC motors'20076,828,752'Driving equipment and semiconductor equipment for alternating-current motor'20045,463,299'Current controller for controlling a current flowing in a load using a PWM inverter and method used thereby'19955,381,584'Vacuum cleaner'1995RE034286'Method and apparatus for operating vacuum cleaner'19935,184,057'Control method and device for AC motor'19934,980,617'Speed control apparatus of movable equipment'19904,958,406'Method and apparatus for operating vacuum cleaner'19904,879,502'Speed control apparatus and method for motors'19894,726,738'Motor-driven compressor provided with torque control device'19884,166,235'Magnetron comprising ferromagnetic material members axially magnetized in opposite directions'1979Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1979–2007Patents assigned to HITACHI LTD (10)· patent assignee history
1979Based in Hitachi, JP· patent location history
1988–2007Based in Hitachiota, JP· patent location history
1989Patents assigned to HITACHI ENG CO LTD (1)· patent assignee history
1990Based in Hitachioota, JP· patent location history
1993–1995Based in Hitachiohta, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HITACHI LTD | 10 | 1979–2007 |
| HITACHI ENG CO LTD | 1 | 1989 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachiota, JP | 7 | 1988–2007 |
| Hitachiohta, JP | 2 | 1993–1995 |
| Hitachioota, JP | 1 | 1990 |
| Hitachi, JP | 1 | 1979 |