Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6647693 | Three-dimensional structures of sheet material | — | 2003-11-18 |
| 6129388 | Slide chart with slide-stop flaps | — | 2000-10-10 |
| 5450680 | Pop-up card and method of making same | — | 1995-09-19 |
| 5447769 | Disk mounting system for wheel calculator the like and method of making same | — | 1995-09-05 |
| 5374461 | Rotatable wheel assembly | — | 1994-12-20 |
| 5362103 | Pull-out booklet | — | 1994-11-08 |
| 4349346 | Method of making slide calculator | — | 1982-09-14 |
| 4323609 | Rotatable wheel assembly | — | 1982-04-06 |
| 4233768 | Slide calculator | — | 1980-11-18 |
| 4220075 | Method of making a slide calculator | — | 1980-09-02 |
| 4202546 | Game | — | 1980-05-13 |