Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11162240 | Hydraulic excavation and delivery device | William R. Bath | 2021-11-02 |
| 9988132 | Combination apparatus made of sacrificial anode material removably affixed to a shaft of a propeller of an engine of a water craft, the apparatus including removable and replaceable cutting blades | — | 2018-06-05 |
| 6591844 | Elastomeric monofilament dental tapes | David R. Barlow, Dale G. Brown, Ira D. Hill, James M. Hill | 2003-07-15 |
| 6582634 | Process of making a yarn | David McKenzie Hill | 2003-06-24 |
| 6303063 | Process of making a yarn | David MacKenzie Hill | 2001-10-16 |
| 4674348 | Slow speed pinion drive | — | 1987-06-23 |