Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10683881 | Material flow amplifier | Avijit Ghosh | 2020-06-16 |
| 10458446 | Material flow amplifier | Avijit Ghosh | 2019-10-29 |
| 10302104 | Helix amplifier fittings | John Somarakis | 2019-05-28 |
| 7674387 | Oil filtration system | Robert Murray Boatman | 2010-03-09 |
| 5148878 | Ram boring machine | Alfons Hesse, Gerhard Balve, Franz-Josef Puttmann | 1992-09-22 |
| 5098368 | Centrifugal apparatus | — | 1992-03-24 |
| 4938297 | Ram boring machine | — | 1990-07-03 |
| 4871034 | Rammer | — | 1989-10-03 |
| 4840234 | Pneumatic ram boring machine | — | 1989-06-20 |
| 4833974 | Ram boring machine | — | 1989-05-30 |
| 4747695 | Centrifugal stirring apparatus | — | 1988-05-31 |
| 4732222 | Ram boring machine with impact blade piston | — | 1988-03-22 |
| 4671703 | Apparatus for driving pipes through the ground | — | 1987-06-09 |
| 4650374 | Apparatus for driving pipes through the ground | — | 1987-03-17 |
| 4505761 | Method and apparatus for quenching a torch-cut work-piece | — | 1985-03-19 |
| 4460050 | Pipe driving attachment | — | 1984-07-17 |
| 4436293 | Rotary support for continuous casting ladles | Edouard Legille | 1984-03-13 |
| 4295533 | Pneumatically operated ram borer | — | 1981-10-20 |
| 4250972 | Pneumatic ram boring device | — | 1981-02-17 |
| 4249620 | Method of boring holes which are open at both ends in the ground | — | 1981-02-10 |
| 4221157 | Pneumatically operated percussion boring apparatus | — | 1980-09-09 |