Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695714 | Gold-palladium alloys for dental materials | Bernd Kempf, Doris Hathaway, Hans-Martin Ringelstein, Bernd Meier | 1997-12-09 |
| 5560742 | Use of palladium-silver alloys for the manufacture of dentures | Werner Groll, Doris Hathaway, Manfred Stuemke | 1996-10-01 |
| 5221207 | Yellow dental alloy with a high gold content | Bernd Kempf, Werner Groll | 1993-06-22 |