Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5083462 | Process and device for detecting defects in moving parts having a central rotating shaft | Hendrik Dolfsma | 1992-01-28 |
| 4888976 | Device for measuring the effective viscosity of a lubricant | — | 1989-12-26 |
| 4768380 | Method and means for detecting faults or defects in moving machine parts | Adrianus J. Smulders | 1988-09-06 |
| 4728943 | Means for determining the state of lubrication in surfaces lubricated by a lubricant and rolling or sliding with respect to one another | — | 1988-03-01 |
| 4511837 | Measuring system for measuring the variation of the capacitive impedance of a bearing installed in a housing | Hendrik Dolfsma | 1985-04-16 |
| 4471295 | Device for detecting the variation of a capacitive impedance having dielectric consisting of a lubricant | — | 1984-09-11 |
| 4345203 | Device for measuring the lubrication of surfaces rolling or sliding relative to each other and lubricated with a lubricant | Rutgerus S. Heemskerk, Hendrik Dolfsma | 1982-08-17 |