Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4911044 | Ultrasonic vibration cutting device | Seiji Hamada | 1990-03-27 |
| 4864904 | Ultrasonic vibrational cutting apparatus | — | 1989-09-12 |
| 4856391 | Ultrasonic oscillation machining apparatus | — | 1989-08-15 |
| 4812697 | Ultrasonic vibrator and a method of controllingly driving same | — | 1989-03-14 |
| 4787265 | Torsion vibrator | — | 1988-11-29 |
| 4728843 | Ultrasonic vibrator and drive control method thereof | — | 1988-03-01 |
| 4705980 | Drive control method of ultrasonic vibrator | — | 1987-11-10 |
| 4703214 | Ultrasonic vibrator and its drive control method | — | 1987-10-27 |
| 4697117 | Rotary ultrasonic motor | — | 1987-09-29 |
| 4652786 | Torsional vibration apparatus | — | 1987-03-24 |
| 4635483 | Driving control method of ultrasonic transducer | — | 1987-01-13 |
| 4620121 | Piezoelectric apparatus for activating square plate resonator | — | 1986-10-28 |
| 4577500 | Driving control method of ultrasonic transducer | — | 1986-03-25 |
| 4562413 | Driving frequency controlling method for an ultrasonic transducer driving apparatus | Seiji Hamada | 1985-12-31 |
| 4483571 | Ultrasonic processing device | — | 1984-11-20 |
| 4277758 | Ultrasonic wave generating apparatus with voltage-controlled filter | — | 1981-07-07 |
| 4275363 | Method of and apparatus for driving an ultrasonic transducer including a phase locked loop and a sweep circuit | Seiji Hamada | 1981-06-23 |