Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5397051 | Cake box | Richard C. H. Chang | 1995-03-14 |
| 5351879 | Paper food container having a bottom section formed with a flange | Richard C. H. Chang | 1994-10-04 |
| 5326017 | Paper container with multiple compartments partitioned by walls in different heights | Richard C. H. Chang | 1994-07-05 |