Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6284688 | Refractory compositions | Manfred Fessel, Vincent Edward Mellows, Reinhard Stötzel | 2001-09-04 |
| 4919188 | Mould and process for the production of nodular or compacted graphite iron castings | Manfred Fessel | 1990-04-24 |
| 4574869 | Casting mould, and cavity former and sleeve for use therewith | Helmut Schopp | 1986-03-11 |
| 4467858 | Blind feeder sleeves | Helmut Schopp | 1984-08-28 |
| 4423762 | Method for the production of a metal casting mould having a riser and a cavity former and riser sleeve for use therein | Helmut Schopp | 1984-01-03 |