Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10488244 | Self-filling graduated cylinder system | David R. Krause, Kenneth R. Smith | 2019-11-26 |
| 10151614 | Self-filling graduated cylinder system | David R. Krause, Kenneth R. Smith | 2018-12-11 |
| 5232031 | Wooden cummberbund apparatus and methods | — | 1993-08-03 |
| 5173969 | Wooden cummerbund | — | 1992-12-29 |