| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 5 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Computer technology | |
| #3 | Machines | |
| #4 | Mechanical elements | |
| #5 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Teaching materials | |
| #2 | Mechanically computing digital computers | |
| #3 | Unspecified technologies | |
| #4 | Filing and indexing | |
| #5 | Nails |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schott Andrew F | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US3229386A | Tools for teaching geometry | |
| US3283421A | Educational worksheet | |
| US3283420A | Calculator | |
| US3151404A | Abacus | |
| US3084457A | Educational work sheet | |
| US3136076A | Educational tool adapted to facilitate teaching the arithmetic of fractions | |
| US3076272A | Abacus | |
| US2872742A | Abacus with magnetic means for holding unit counters in position | |
| CA577613A | Calculating device | |
| CA705762A | Abacus | |
| CA637943A | Abacus with magnetic means for holding unit counters in position | |
| CA658690A | Educational tool adapted to facilitate teaching of arithmetic of fractions | |
| CA661213A | Educational work sheet |