Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4996289 | Continuous preparation of aqueous melamine/formaldehyde precondensate solutions | Heinz Berbner, Klaus Ebel, Michael Kuczaty, Frank P. Woerner, Hans D. Zettler | 1991-02-26 |
| 4871373 | Continuous preparation of solutions of low viscosity solvents and high viscosity, pasty products | Volker Kiener, Guenther Nonn, Harald Schewski, Karl Buellmeyer | 1989-10-03 |
| 4557969 | Sheet-like packing material of melamine or phenol resin fibers | Heinz Berbner, Heinz Voelker, Hans D. Zettler | 1985-12-10 |
| 4486102 | Mixing apparatus for multi-component plastics, especially polyurethane | Heino Thiele, Werner Weber, Hans D. Zettler, Klaus Schlueter, Josef Wallner | 1984-12-04 |