Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6926530 | Game apparatuses and methods for use in teaching the addition and subtraction of positive and negative numbers | — | 2005-08-09 |
| 6786485 | Dice game apparatus and methods for using same | — | 2004-09-07 |
| 6755658 | Game apparatuses and methods for use in teaching the addition, subtraction, multiplication, and division of positive and negative numbers | — | 2004-06-29 |
| 5247993 | Enhanced imbibition oil recovery process | A. M. Sam Sarem, Richard D. Hutchins | 1993-09-28 |
| 5172763 | Steam-foam drive | Shane S. Mohammadi | 1992-12-22 |