Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6010763 | Fireproofing material | Robert Graf | 2000-01-04 |
| 5876042 | Pipe seal with a sheet-metal casing bendable around a pipe | Robert Graf | 1999-03-02 |
| 5496881 | Composition for forming fireproof coatings and caulking and a method of use | Robert Graf | 1996-03-05 |
| 5453212 | Powdery hydrophobic filler for bituminized traffic surfaces | Stefan Keipl, Wilhelm Kaemereit, Oskar Schmitt | 1995-09-26 |
| 5126076 | Low-flammability structural elements, particularly boards, and process for constructing them | Robert Graf | 1992-06-30 |
| 4816312 | Fire prevention material | Robert Graf, Stefan Keipl | 1989-03-28 |