Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10119627 | Poppet valve | Peter van Drumpt, John Paddock | 2018-11-06 |
| 9796639 | Polymer mixing technique | Peter van Drumpt, John Paddock | 2017-10-24 |
| 9243378 | Device for placing material on or beneath the soil surface | Peter van Drumpt | 2016-01-26 |
| 8769866 | High pressure injection system for applying a pesticide beneath the surface of the ground | James H. Cink, Richard A. Warriner, Peter van Drumpt | 2014-07-08 |
| 8640636 | Device for placing material on or beneath the soil surface | Peter van Drumpt | 2014-02-04 |
| 7581684 | Device for placing material on or beneath the soil surface and method for doing the same | Peter van Drumpt | 2009-09-01 |