Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9200450 | Ridge cap with asphaltic foam materials | Casey G. Tzeng | 2015-12-01 |
| 8549802 | Ridge cap with asphaltic foam materials | Casey G. Tzeng | 2013-10-08 |
| 8017663 | Modified asphaltic foam materials | Nicolae Achim | 2011-09-13 |
| D422095 | Ridge cap roofing shingle | Casey G. Tzeng | 2000-03-28 |
| 5965626 | Method of making rigid asphaltic foam | Casey G. Tzeng | 1999-10-12 |
| D413396 | Roofing shingle | Casey G. Tzeng | 1999-08-31 |
| 5816014 | Method of making a ridge cap roofing tile | Casey G. Tzeng | 1998-10-06 |
| 5813176 | Asphaltic foam | Casey G. Tzeng | 1998-09-29 |
| 5786085 | Asphaltic polyurethane foam for roofing applications | Casey G. Tzeng | 1998-07-28 |