Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6500095 | Portable personal breathing apparatus and method for exercising the lungs | — | 2002-12-31 |
| 6083141 | Portable respiratory exercise apparatus and method for using the same | — | 2000-07-04 |
| 5910071 | Portable, personal breathing apparatus | — | 1999-06-08 |
| 5899832 | Compact lung exercising device | — | 1999-05-04 |
| 5890998 | Portable personal breathing apparatus | — | 1999-04-06 |
| 5658221 | Portable personal breathing apparatus and method of using same | — | 1997-08-19 |
| 5145296 | Apparatus and method for cutting holes | — | 1992-09-08 |
| 5094573 | Multidirectional cutting tool | — | 1992-03-10 |
| RE33440 | Annular cutter | — | 1990-11-13 |
| 4952102 | Annular hole cutter | — | 1990-08-28 |
| 4871287 | Annular cutter having radial clearance | — | 1989-10-03 |
| 4813819 | Method for cutting holes | — | 1989-03-21 |
| 4632610 | Annular hole cutter | — | 1986-12-30 |
| 4557641 | Annular cutter | — | 1985-12-10 |
| 4538944 | Annular cutter | — | 1985-09-03 |
| 4514120 | Chip breaker for annular hole cutting tools | — | 1985-04-30 |
| 4452554 | Annular hole cutter | — | 1984-06-05 |
| 4322187 | Annular hole cutter | — | 1982-03-30 |
| 4322188 | Annular hole cutter | — | 1982-03-30 |
| 4261673 | Magnetic base drill | — | 1981-04-14 |
| RE30519 | Accessory support plates for a magnet base drill | — | 1981-02-17 |
| 4204783 | Machine for cutting holes with annular cutters | — | 1980-05-27 |
| 4193721 | Arbor for annular hole cutter | — | 1980-03-18 |