Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8186538 | Food-holding receptacle for use with a beverage container | — | 2012-05-29 |
| 7726512 | Universal food-holding receptacle for use with beverage containers of diverse shapes and sizes | — | 2010-06-01 |
| 5475453 | Manually-operated tray assembly for dispensing and receiving overhead projector transparencies | — | 1995-12-12 |
| 5134778 | Design-making instrument | — | 1992-08-04 |
| 5024625 | Top and propelling element | — | 1991-06-18 |
| 4912849 | Sketching and tracing instrument | — | 1990-04-03 |
| 4762380 | Interactive kaleidoscope | — | 1988-08-09 |
| 4740046 | Liquid kaleidoscope | — | 1988-04-26 |
| 4492057 | Yo-yo with non-circular cross-sectional axle | — | 1985-01-08 |
| D275582 | Return top | — | 1984-09-18 |
| 4442625 | Tape-supported sleeper yo-yo | — | 1984-04-17 |
| 4437261 | Yo-yo with twist-resistant string | — | 1984-03-20 |
| 4318243 | Precession-resistant yo-yo device | — | 1982-03-09 |
| 4290224 | Tape-supported yo-yo | — | 1981-09-22 |
| 4290225 | Looped-string pulley-supported yo-yo | — | 1981-09-22 |