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| US patents in Extrusion | |
|---|---|
| # 3650652 | Screw design patent (Efficient screw) this was the first US barrier patent. |
| # 3734667 | Extruder patent |
| # 3788612 | Screw design patent (“W”mixer) |
| # 4444507 | Mixer patent (Triangular mixer) |
| # 4723847 | Screw design patent (Adjustable Dam) |
| # 4842414 | Screw design patent (R.V.Flow) |
| # 4896969 | Screw design patent (Concept) |
| # 5071255 | Screw design patent (Adjustable Dam) |
| US patents in Injection Molding | |
| # 5151282 | Non Return Valve patent (Repeater) |
| # 5258158 | Non Return Valve patent (Repeater) |
| # 5470514 | Precise shot control (Smartshot) |
| # 5975127 | Air Shut-off Nozzle |
| # 6203311 | Non-Return Valve Patent (APV) |
| # 6413076 | Machine Patent (The Coupler) |
| # 6464488 | Non Return Valve Patent (APV Mixing) |
| # 6739862 | ICU (Injection Unit) |
| European patents | |
| #1084356 | |
| Various Foreign Patents Not Listed. | |