Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5248787 | Volatile organic barium, strontium and calcium compounds | Klaas Timmer, Carolus Ida Maria Antonius Spee, Harmen A. Meinema | 1993-09-28 |
| 4376264 | Method of checking the authenticity of papers and physically identifiable paper for use in said method | Hendrik D. Dokter, Roelof Hildering | 1983-03-08 |