Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5402820 | Stabilizer for pressure regulator | John W. Duffy, Steven D. Kehoe, William J. Bonzer | 1995-04-04 |
| 5271601 | Regulator valve with diaphragm support | William J. Bonzer, John W. Duffy, Douglas C. Pfantz, William H. Earney, Robert D. Gaskill | 1993-12-21 |
| 4624442 | Control regulator having a rolling diaphragm | John W. Duffy, William J. Bonzer, Dennis G. Sickels, Ralph W. Zeigler | 1986-11-25 |
| 4619436 | Control regulator having a fabric reinforced diaphragm | William J. Bonzer | 1986-10-28 |
| 4500979 | Optical seismic transducer | — | 1985-02-19 |