Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D678411 | Strip for teaching-aid | — | 2013-03-19 |
| 8143185 | Photocatalytic deposition of metals and compositions comprising the same | Krishnan Rajeshwar, Norma Tacconi, Chakkankal R. Chenthamarakshan, Wesley Wampler, Thomas F. Carlson | 2012-03-27 |
| D611375 | Balance for teaching | — | 2010-03-09 |
| D585940 | Expandable strip of teaching-aid | — | 2009-02-03 |
| D585096 | Building block board | — | 2009-01-20 |
| D570720 | Balance for teaching | — | 2008-06-10 |
| D570721 | Balance for teaching | — | 2008-06-10 |
| D546390 | Teaching toy | — | 2007-07-10 |
| D532055 | Toy clock | — | 2006-11-14 |