Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9250641 | Load driving circuit and load driving method | Shinichi Miyazaki, Katsunori Yamazaki, Hiroyuki Yoshino, Shoichi Iino | 2016-02-02 |
| 8666094 | Drive control method of electrostatic-type ultrasonic transducer, electrostatic-type ultrasonic transducer, ultrasonic speaker using electrostatic-type ultrasonic transducer, audio signal reproducing method, superdirectional acoustic system, and display | — | 2014-03-04 |
| 8130973 | Superdirectional acoustic system and projector | Akihito Uetake | 2012-03-06 |
| 8126171 | Electrostatic ultrasonic transducer and ultrasonic speaker | Hirokazu Sekino, Hideki Kojima | 2012-02-28 |
| 8049368 | Load driving circuit and load driving method | Shinichi Miyazaki, Katsunori Yamazaki, Hiroyuki Yoshino, Shoichi Iino | 2011-11-01 |
| 8045735 | Ultrasonic transducer and ultrasonic speaker using the same | Hirokazu Sekino, Yoshiki Fukui, Shinichi Miyazaki | 2011-10-25 |
| 8009846 | Ultrasonic speaker and projector | Hirokazu Sekino, Yoshiki Fukui, Shinichi Miyazaki | 2011-08-30 |
| 7949143 | Ultrasonic transducer, ultrasonic speaker, acoustic system, and control method of ultrasonic transducer | Hirokazu Sekino | 2011-05-24 |
| 7907740 | Electrostatic ultrasonic transducer drive control method, electrostatic ultrasonic transducer, ultrasonic speaker using the same, audio signal reproduction method, ultra-directional acoustic system, and display device | — | 2011-03-15 |
| 7881489 | Ultrasonic transducer and ultrasonic speaker using the same | Hirokazu Sekino, Yoshiki Fukui, Shinichi Miyazaki | 2011-02-01 |
| 7804971 | Electrostatic ultrasonic transducer, ultrasonic speaker and display device | — | 2010-09-28 |
| 7769193 | Electrostatic ultrasonic transducer, ultrasonic speaker, audio signal reproduction method, electrode manufacturing method for use in ultrasonic transducer, ultrasonic transducer manufacturing method, superdirective acoustic system, and display device | — | 2010-08-03 |
| 7690792 | Projector and method of controlling ultrasonic speaker in projector | — | 2010-04-06 |
| 7564986 | Ultrasonic speaker and projector | Hirokazu Sekino, Yoshiki Fukui, Shinichi Miyazaki | 2009-07-21 |
| 7542579 | Ultrasonic transducer, ultrasonic speaker, acoustic system, and control method of ultrasonic transducer | Hirokazu Sekino | 2009-06-02 |
| 7224098 | Ultrasonic transducer and method of manufacturing ultrasonic transducer | Mutsuto Tezuka | 2007-05-29 |
| 7210785 | Projector | Yoshiki Fukui, Shinichi Miyazaki | 2007-05-01 |
| 7191655 | Material determination system and method | — | 2007-03-20 |
| 6879068 | Power generator, timepiece and electronic device having the same, and cogging torque adjustment method for the same | — | 2005-04-12 |
| 6831446 | Power generator, timepiece and electronic device having the same, and cogging torque adjustment method for the same | — | 2004-12-14 |
| 6800983 | Magnetic circuit structure, and power-generating device and electronic device using the same | Yoshitaka Iijima | 2004-10-05 |
| 6633511 | Electronic controlling type mechanical timepiece | Masatoshi Moteki, Hirokazu Sekino | 2003-10-14 |
| 6628037 | Power generator, electronic device using the same, method of setting plate thickness in a magnetic circuit in electronically controlled timepiece and power generator | — | 2003-09-30 |
| 6541882 | Power generator, timepiece and electronic device having the same, and cogging torque adjustment method for the same | — | 2003-04-01 |
| 6166470 | Brushless DC motor | Hiroshi Miyazawa, Norio Ito, Yasushi Soya, Koichi Saito | 2000-12-26 |