| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Engines, pumps and turbines | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Street cleaning | |
| #2 | Non-positive-displacement pumps | |
| #3 | Vehicle seats | |
| #4 | Construction of roads |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hanson Harry I | 4 |
| #2 | Odell Robert I | 3 |
| #3 | Hank Emil J | 2 |
| #4 | Abbe George C | 2 |
| #5 | Hoge Robert H | 2 |
| #6 | Heinzroth William H | 1 |
| #7 | Gayer John D | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3217431A | Shoes for snowplows and the like | |
| US3087187A | Automated leaf collector | |
| US3208359A | Automatic shutoff for spreader | |
| US3036326A | Road cleaning machines | |
| US2951632A | Air blower | |
| US2887714A | Suction road cleaning machine | |
| US2187509A | Control seat | |
| US2094515A | Scraper | |
| CA629863A | Road material spreader | |
| CA643989A | Road cleaning machines | |
| CA577768A | Road material spreader |