Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8997796 | Durable semi-rigid single-layer flexible duct | Steven Allan Liebson, Robert Cohen | 2015-04-07 |
| 8469062 | Durable semi-rigid flexible duct | Steven Allan Liebson, Robert Cohen | 2013-06-25 |
| 8439085 | Semi-rigid flexible duct | Steven Allan Liebson, Robert Cohen | 2013-05-14 |
| D651291 | Duct connector ring | Steven Allan Liebson, Robert Cohen | 2011-12-27 |
| D646373 | Duct adaptor ring | Steven Allan Liebson, Robert Cohen | 2011-10-04 |
| D635239 | Draft blocker | Steven Allan Liebson, Robert Cohen | 2011-03-29 |
| D566826 | Flexible duct | Robert Cohen | 2008-04-15 |