Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D541831 | Hole cutter | — | 2007-05-01 |
| 7137462 | Drill bit | — | 2006-11-21 |
| 7097396 | Drill bit | — | 2006-08-29 |
| 6966730 | Shank installation structure and cutters | — | 2005-11-22 |
| 6926476 | Core body lock device of core drill and core body used for the device | — | 2005-08-09 |
| 6817428 | Drill bit | — | 2004-11-16 |
| 6250856 | Quick attachment structure for drill shank | — | 2001-06-26 |
| 5915893 | Multistage bit and stopper | — | 1999-06-29 |
| 5810523 | Apparatus for drilling a hole having an undercut space | — | 1998-09-22 |
| 5735650 | Drill bit for drilling an undercut hole | — | 1998-04-07 |
| 5316418 | Hole cutter | — | 1994-05-31 |
| 5284409 | Expansion anchor for engagement in a hole | — | 1994-02-08 |
| 5199508 | Rotary hammer drill | — | 1993-04-06 |
| 5167475 | Core drill | — | 1992-12-01 |
| 5050286 | Driving mechanism for anchor | — | 1991-09-24 |
| 4998981 | Bit for drilling an undercut hole | — | 1991-03-12 |
| 4919579 | Anchor construction and method of manufacture | — | 1990-04-24 |
| 4865246 | Anchor bolt construction and method of manufacture | — | 1989-09-12 |
| 4635737 | Undercutting drill | — | 1987-01-13 |
| 4408935 | Metal borer | — | 1983-10-11 |
| 4297059 | Apparatus for forming holes in plate glass | — | 1981-10-27 |
| 4209272 | Apparatus and method of forming holes in plate glass | — | 1980-06-24 |