Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4944656 | Telescopic rod means having rotatably retractable display sheet | Ou-Yang C. Ho | 1990-07-31 |
| 4800834 | Telescopic rod means with rolling display sheet | — | 1989-01-31 |
| 4787161 | Advertising writing instrument | — | 1988-11-29 |