Akio Kumada

Person

Kokubunji, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Piezoelectric revolving resonator and single-phase ultrasonic motor
- Patent number 5,008,581
- Issue date Apr 16, 1991
- Hitachi Maxell, Ltd.
- Akio Kumada
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Piezo electric motor
- Patent number 4,947,076
- Issue date Aug 7, 1990
- Hitachi Maxell, Ltd.
- Akio Kumada
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Piezoelectric revolving resonator and ultrasonic motor
- Patent number 4,868,446
- Issue date Sep 19, 1989
- Hitachi Maxell, Ltd.
- Akio Kumada
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Torsional mode ultrasonic vibrator
- Patent number 4,663,556
- Issue date May 5, 1987
- Hitachi Maxell, Ltd.
- Akio Kumada
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Ultrasonic motor using bending, longitudinal and torsional vibrations
- Patent number 4,642,509
- Issue date Feb 10, 1987
- Hitachi Maxell, Ltd.
- Akio Kumada
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Display device with transparent cover as a vibrator of a sound gene...
- Patent number 4,496,247
- Issue date Jan 29, 1985
- Hitachi, Ltd.
- Akio Kumada
- G02 - OPTICS
Information Patent Grant
Piezoelectric ceramic transducer
- Patent number 4,471,258
- Issue date Sep 11, 1984
- Hitachi, Ltd.
- Akio Kumada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Display device structure
- Patent number 4,392,747
- Issue date Jul 12, 1983
- Hitachi, Ltd.
- Akio Kumada
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Ceramic transparent piezoelectric transducer
- Patent number 4,367,426
- Issue date Jan 4, 1983
- Hitachi, Ltd.
- Akio Kumada
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Piezo-electric bimorph type transducer
- Patent number 4,367,504
- Issue date Jan 4, 1983
- Hitachi Denshi Kabushiki Kaisha
- Takeo Seki
- G11 - INFORMATION STORAGE
Information Patent Grant
Transparent flat panel piezoelectric speaker
- Patent number 4,352,961
- Issue date Oct 5, 1982
- Hitachi, Ltd.
- Akio Kumada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electro-optical light shutter device
- Patent number 4,154,505
- Issue date May 15, 1979
- Hitachi, Ltd.
- Yasuo Kato
- G02 - OPTICS

Akio Kumada

Person

Patents Grantslast 30 patents

Piezoelectric revolving resonator and single-phase ultrasonic motor

Piezo electric motor

Piezoelectric revolving resonator and ultrasonic motor

Torsional mode ultrasonic vibrator

Ultrasonic motor using bending, longitudinal and torsional vibrations

Display device with transparent cover as a vibrator of a sound gene...

Piezoelectric ceramic transducer

Display device structure

Ceramic transparent piezoelectric transducer

Piezo-electric bimorph type transducer

Transparent flat panel piezoelectric speaker

Electro-optical light shutter device