Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5935667 | Dual porosity PTFE tubes | Robert Calcote, Rajagopal R. Kowligi | 1999-08-10 |
| 5641443 | Method of forming dual porosity PTFE tubes by extrusion of concentric preforms | Robert Calcote, Rajagopal R. Kowligi | 1997-06-24 |
| 5453235 | Method of forming dual porosity FTFE tubes by extrusion of concentric preforms | Robert Calcote, Rajagopal R. Kowligi | 1995-09-26 |