| 1979/06 |
Electrostatic capacity type level detector electrode |
| 1983/08 |
Level detector with electronic timer |
| 1984/01 |
Electrostatic capacity type level detector |
| 1986/03 |
Oil content meter |
| 1987/04 |
Solenoid combination distance meter |
| 1991/08 |
Supersonic wave transmitter receiver |
| 1992/03 |
Tank detector |
| 1996/05 |
Signal discriminator |
| 1998/04 |
Supersonic wave level meter: 2 cases |
|
Supersonic wave flow meter and related matters: 6 cases |
| 1999/10 |
Content detector and related matters: 2 cases |
| 2000/03 |
Surface detector: 2 cases |
