AK

Akio Kumada

HI Hitachi: 7 patents #5,859 of 28,497Top 25%
HM Hitachi Maxell: 5 patents #189 of 1,211Top 20%
HD Hitachi Denshi: 1 patents #119 of 275Top 45%
📍 Kokubunji, JP: #167 of 714 inventorsTop 25%
Overall (All Time): #429,748 of 4,157,543Top 15%
12
Patents All Time

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #TitleCo-InventorsDate
5008581 Piezoelectric revolving resonator and single-phase ultrasonic motor Takahiko Iochi, Minoru Okada 1991-04-16
4947076 Piezo electric motor 1990-08-07
4868446 Piezoelectric revolving resonator and ultrasonic motor 1989-09-19
4663556 Torsional mode ultrasonic vibrator 1987-05-05
4642509 Ultrasonic motor using bending, longitudinal and torsional vibrations 1987-02-10
4496247 Display device with transparent cover as a vibrator of a sound generator 1985-01-29
4478217 Laser surgical apparatus Tamotsu Shimada, Daizo Tokinaga, Chiaki Shinbo, Hideyuki Horiuchi, Masamoto Takatsuji 1984-10-23
4471258 Piezoelectric ceramic transducer 1984-09-11
4392747 Display device structure Takahiko Ihochi, Makoto Homma, Masashi Tanaka 1983-07-12
4367426 Ceramic transparent piezoelectric transducer Takahiko Ihochi, Masashi Tanaka, Kazuma SUZUKI, Masaru Yokosuka, Shinsuke Miura +1 more 1983-01-04
4367504 Piezo-electric bimorph type transducer Takeo Seki, Yukio Shinoda 1983-01-04
4352961 Transparent flat panel piezoelectric speaker Shigeo Nakamura 1982-10-05