Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D331608 | Illuminated tracing toy | Charles E. Heiss | 1992-12-08 |
| 4992914 | Illuminated stepping stones | Charles E. Heiss | 1991-02-12 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D331608 | Illuminated tracing toy | Charles E. Heiss | 1992-12-08 |
| 4992914 | Illuminated stepping stones | Charles E. Heiss | 1991-02-12 |