Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8578576 | Machine to produce expanded metal spirally lock-seamed tubing from solid coil stock | — | 2013-11-12 |
| 8578577 | Machine to produce expanded metal spirally lock-seamed tubing from solid coil stock | — | 2013-11-12 |
| 6295853 | Spirally formed pipe cutter with driving mechanism to actively rotate inner knife | — | 2001-10-02 |
| 6192726 | System and method for corrugating spiral formed pipe | — | 2001-02-27 |
| 5992275 | Pipe cutter having non-rotating, overlapping knives | — | 1999-11-30 |
| 5860305 | Pipe cutter with dual outer cutting knives and method | — | 1999-01-19 |
| 5636541 | Apparatus for forming and cutting spiral pipe | — | 1997-06-10 |
| 5609055 | Method and apparatus for cutting and notching a hollow pipe | — | 1997-03-11 |
| 5421185 | Apparatus for cutting sheet material into curved segments | — | 1995-06-06 |
| 5257521 | Apparatus and method for cutting spiral pipe | — | 1993-11-02 |
| 5193374 | Apparatus for cutting spiral pipe | — | 1993-03-16 |
| 5105639 | Apparatus for forming spiral pipe | — | 1992-04-21 |
| 5020351 | Apparatus for flattening irregular circumferential surfaces in spirally formed pipe | — | 1991-06-04 |
| 4924684 | Apparatus for forming and cutting spiral pipe | — | 1990-05-15 |
| 4823579 | Apparatus for cutting hollow pipes | — | 1989-04-25 |
| 4711110 | Apparatus for crimping pipe | — | 1987-12-08 |
| 4706481 | Apparatus for cutting hollow pipe | — | 1987-11-17 |
| 4567742 | Ribbed spiral pipe producing machine | — | 1986-02-04 |