![[Main Page]](/en/upload/wiki.png)
Main Page
Patent:US6056553
| Patent: | US 6056553 |
| Title: | Apparatus for math teaching and self-learning |
| Date: | 02.05.2000 |
| Place: | |
| Country: | USA |
| Person: | Huang, Pingsheng (20 Alpine Rd., Towaco, NJ 07082) |
| Company: | |
| Internal Links: | Lehrmittel |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US6056553 (espacenet), US6056553 (uspto) |
(There is currently no text in this page)