Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7886640 | Rotational cutting machine | — | 2011-02-15 |
| 7559828 | Double-grinding-wheel type drill bit grinding device with a single driving shaft and grinding method thereof | — | 2009-07-14 |
| 7488238 | Emery wheel grinding machine with adjustable drill bit chuck | — | 2009-02-10 |
| D530728 | Grinding machine | — | 2006-10-24 |
| 7121932 | Portable drill sharpener | — | 2006-10-17 |