Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6751407 | Camera film cassette assembly apparatus and method | Ivan W. K. Shum | 2004-06-15 |
| 6522835 | Photographic film package with detachable cartridge | Bangly K. W. So, Ivan W. K. Shum | 2003-02-18 |
| 6466517 | Global travel clock | — | 2002-10-15 |
| 4746943 | Film tracking mechanism | — | 1988-05-24 |