Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6499244 | Firearm safety lock | Matthew Colegrove | 2002-12-31 |
| 5890373 | Room air conditioner design | — | 1999-04-06 |
| 5732565 | Modular room air conditioner | Rengaswamy Ramakrishnan, Eric H. Albrecht, Roger D. Conatser | 1998-03-31 |
| 5622058 | Modular room air conditioner | Rengaswamy Ramakrishnan, Eric H. Albrecht, Roger D. Conatser | 1997-04-22 |