Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9870912 | Mass spectrometers having real time ion isolation signal generators | David Rafferty | 2018-01-16 |
| 7077348 | Vertical shaft impactor with suspended impeller | Bruce G. Johnson | 2006-07-18 |
| 7048214 | Gyratory crusher with hydrostatic bearings | Bruce G. Johnson | 2006-05-23 |
| 5537765 | Double aperture tag | Norman P. Liebman | 1996-07-23 |
| 5323976 | Lift line connection for rock crusher components | Bruce G. Johnson | 1994-06-28 |
| 4919348 | Dust seal for gyratory rock crushers | Bruce G. Johnson | 1990-04-24 |
| 4919349 | Dust seal for gyratory rock crushers | Bruce G. Johnson | 1990-04-24 |
| 4773604 | Seat member for gyratory rock crusher bowls | — | 1988-09-27 |
| 4729911 | Wood golf club heads, process of treating them, and apparatus | Bruce G. Johnson | 1988-03-08 |
| 4632751 | Shaker screen | Bruce G. Johnson | 1986-12-30 |
| 4603577 | Apparatus for determining the swing inertia of golf clubs | Bruce G. Johnson | 1986-08-05 |
| 4571112 | Joint assembly | Bruce G. Johnson | 1986-02-18 |
| 4540178 | Golf iron and method of construction | Bruce G. Johnson | 1985-09-10 |
| 4529510 | Shaker screen | Bruce G. Johnson | 1985-07-16 |
| 4454994 | Load bearing surface | Bruce G. Johnson | 1984-06-19 |
| 4351490 | Power drive structure for rotating threadedly supported rock crusher bowls | — | 1982-09-28 |
| 4192472 | Cone crusher | — | 1980-03-11 |