Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6676724 | Powder metal valve seat insert | Sundaram L. Narasimhan, Heron Rodrigues | 2004-01-13 |
| 6599345 | Powder metal valve guide | Sundaram L. Narasimhan, Heron Rodrigues | 2003-07-29 |
| 6214080 | Powdered metal valve seat insert | Sundaram L. Narasimhan, Heron Rodrigues | 2001-04-10 |
| 6139598 | Powdered metal valve seat insert | Sundaram L. Narasimhan, Heron Rodrigues | 2000-10-31 |
| 5960760 | Light weight hollow valve assembly | Simon Narasimhan, Les Ecklund, James Larsen | 1999-10-05 |
| 5934238 | Engine valve assembly | Simon Narasimhan | 1999-08-10 |