Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5903457 | Automated material storage and retrieval system for production lines | — | 1999-05-11 |
| 5507541 | Ball retrieval cart | Sam Chen, East White | 1996-04-16 |
| 5301991 | Tennis ball retriever and storage cart | Sam Chen, East White | 1994-04-12 |