Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6354345 | Pumping system | Frederick A. Nabity, Robert R. Fiedler, James Masek, Russell Todd Barker, Frederick Detlef Sueverkruepp, III +3 more | 2002-03-12 |
| 6178831 | Composite wastewater sampler | Richard D. Hartz | 2001-01-30 |
| 5915932 | Peristaltic pump having a roller support | Frederick A. Nabity, Robert R. Fiedler, James Masek, Russell Todd Barker, Frederick Detlef Sueverkruepp, III +3 more | 1999-06-29 |
| 5652397 | Composite wastewater sampler | Richard D. Hartz | 1997-07-29 |
| 5576503 | Pumping system | Frederick A. Nabity, Robert R. Fiedler, James Masek, Russell Todd Barker, Frederick Detlef Sueverkruepp, III +3 more | 1996-11-19 |
| 5341690 | Composite wastewater sampler | Richard D. Hartz | 1994-08-30 |
| 4734680 | Detection system with randomized transmissions | Stacy Earl Gehman, Kevin T. Ruddell | 1988-03-29 |
| 4683591 | Proportional power demand audio amplifier control | James Leacock | 1987-07-28 |
| 4682348 | Life safety audio system having a voice synthesizer and a constant volume telephone network | James Leacock | 1987-07-21 |