Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8392338 | Product efficiency calculator system and method | Shijin Ren, John Dennis Hamilton | 2013-03-05 |
| 7996327 | Product efficiency calculator system and method | Shijin Ren, John Dennis Hamilton | 2011-08-09 |