Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5317908 | High viscosity transducer for vibratory viscometer | John V. Fitzgerald, John L. Batton | 1994-06-07 |
| 5054313 | Control circuitry for viscosity sensors | John V. Fitzgerald, Teresa M. Walsh, John R. Stone, Edmond J. Dougherty, John L. Batton | 1991-10-08 |
| 4754640 | Apparatus and method for determining the viscoelasticity of liquids | J. Vincent Fitzgerald, Donald W. Nelson, John L. Schrag | 1988-07-05 |
| 4566181 | Rotational vibratory viscometer transducer and circuit | Donald W. Nelson | 1986-01-28 |
| 4524610 | In-line vibratory viscometer-densitometer | J. Vincent Fitzgerald, Donald W. Nelson | 1985-06-25 |
| 4488427 | Rotational vibratory viscometer transducer and circuit | Donald W. Nelson | 1984-12-18 |
| 4299119 | Incremental rotary viscometer | J. Vincent Fitzgerald, Donald W. Nelson | 1981-11-10 |