Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6475253 | Abrasive article and method of making | Scott R. Culler, John J. Gagliardi, Thomas W. Larkey, Eric G. Larson, Jeffrey W. Nelson | 2002-11-05 |
| 5945138 | Cam adjustable former for plastic pipe | John Wise | 1999-08-31 |
| 5582842 | Manifold calibration finger | John Wise | 1996-12-10 |
| 5513975 | Pipe extrusion die head manifold assembly | John Wise | 1996-05-07 |
| 5513974 | Manifold assembly with atmospheric vent | John Wise | 1996-05-07 |
| 5505897 | Method for forming a pipe | John Wise | 1996-04-09 |
| 5460501 | Pipe production line for the manufacture of plastic pipe | John Wise | 1995-10-24 |
| 4904113 | Highway edgedrain | James B. Goddard, Leon H. Zimmerman | 1990-02-27 |
| 4255107 | Control apparatus for producing uniform thickness corrugated tubing | — | 1981-03-10 |