Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822274 | Hydraulic clamping unit for a molding apparatus | Harry Chan | 1989-04-18 |
| 4808098 | Pipe extrusion die with a cooled and vacuumed additional mandrel | Harry Chan | 1989-02-28 |
| 4798472 | Extruder screw with balanced flights of different functional sections | Harry Chan | 1989-01-17 |
| 4789322 | Corrugator with intermeshing overlapping moldblock halves | Harry Chan | 1988-12-06 |
| 4789327 | Adjustable pipe extrusion die with internal cooling | Harry Chan | 1988-12-06 |