| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Canada | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | China | 1 | |
| #5 | Germany | 1 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | France | 1 | |
| #8 | Mexico | 1 | |
| #9 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Control | |
| #3 | Computer technology | |
| #4 | Measurement | |
| #5 | Textiles and paper | |
| #6 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Goods for writing upon | |
| #2 | Teaching materials | |
| #3 | Stamps | |
| #4 | Unspecified technologies | |
| #5 | Weighing | |
| #6 | Mechanically computing digital computers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Stoneberg Bruce | 7 |
| #2 | Hartung Paul G | 5 |
| #3 | Stoneberg J Bruce | 4 |
| #4 | Leung Simon | 1 |
| #5 | Cotter Joan | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US7246556B1 | Case for multiple stamp pads | |
| GB0407417D0 | Abacus for use with an overhead projector | |
| US6799973B2 | System for teaching children about the use of money | |
| US2002166706A1 | Plastic encased weights | |
| US2002104225A1 | Drawing tool | |
| US5876212A | Apparatuses and kits for teaching mathematics | |
| US5630278A | Circle compass | |
| US5615485A | Instruments for drawing circles |