Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7824248 | Wheel assembly for a pneumatic sander | — | 2010-11-02 |
| 4695416 | Method and apparatus for mould-forming expanded plastics form blocks | Charles Treffner | 1987-09-22 |
| 4399948 | Pulverizer | Charles Treffner | 1983-08-23 |
| 4222299 | Multi-bladed cutting apparatus | Charles Treffner | 1980-09-16 |