Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5743519 | U-turn high capacity sheet feeder for fax machine or printers | Joseph J. Chang, Shih-Chin Chang, Joe-Te Hsiung | 1998-04-28 |
| 5523821 | Mobile copy machine extension unit | Joseph J. Chang, Shih-Chin Chang | 1996-06-04 |