Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4813863 | Rotary extruder with a gear pump | Granville J. Hahn, Durward E. Rutledge | 1989-03-21 |
| 4713271 | Foamed polymer tubing | Alonzo H. Searl, Granville J. Hahn | 1987-12-15 |
| 4621678 | Heat exchanger apparatus for extruding thermoplastic compositions | Granville J. Hahn, Alonzo H. Searl, Walter E. Sommerman | 1986-11-11 |
| 4611987 | Apparatus for forming multilayer thermoplastic resin extrusions | Granville J. Hahn, Marion Johnson, Jackie D. Murley, Carl Blanchard | 1986-09-16 |
| 4560334 | Apparatus for extruding thermoplastic compositions | — | 1985-12-24 |
| 4548570 | Extrusion apparatus for producing thermoplastic pipe | Granville J. Hahn | 1985-10-22 |
| 4526736 | Process and apparatus for manufacturing flexible foamed articles | Alonzo H. Searl, Granville J. Hahn | 1985-07-02 |
| 4512395 | Multiple heat exchanger distribution apparatus | Granville J. Hahn | 1985-04-23 |
| 4512943 | Extrusion process for producing thermoplastic pipe | Granville J. Hahn | 1985-04-23 |
| 4507071 | Coextrusion apparatus for producing multiple layered thermoplastic pipe | Granville J. Hahn, Jackie D. Murley | 1985-03-26 |
| 4501543 | Rotary extruder | Granville J. Hahn | 1985-02-26 |
| 4499041 | Coextrusion process for producing multiple layered thermoplastic pipe | Granville J. Hahn, Jackie D. Murley | 1985-02-12 |
| 4483669 | Multiple-layered sheeting apparatus | Granville J. Hahn, Jackie D. Murley | 1984-11-20 |
| 4483812 | Valve plate and feedblock design for co-extrusion apparatus and co-extrusion process using same | Granville J. Hahn, Jackie D. Murley | 1984-11-20 |
| 4469651 | Process for extruding thermoplastic compositions | Granville J. Hahn | 1984-09-04 |
| 4451586 | Process and apparatus for manufacturing flame retardant flexible foamed articles | Alonzo H. Searl, Granville J. Hahn | 1984-05-29 |
| 4443397 | Multiple-layered sheeting apparatus and process therefor | Granville J. Hahn | 1984-04-17 |
| 4362482 | Apparatus for extruding thermoplastic compositions | — | 1982-12-07 |
| 4249875 | Co-extrusion apparatus and method for producing multiple-layered thermoplastic pipe | Edward Hart | 1981-02-10 |
| 4221836 | Coextruded plastic sheeting | Bob Cruson | 1980-09-09 |