| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Australia | 4 | |
| #3 | Canada | 4 | |
| #4 | New Zealand | 4 | |
| #5 | EPO (European Patent Office) | 3 | |
| #6 | WIPO (World Intellectual Property Organization) | 3 | |
| #7 | China | 1 |
| # | Industry | |
|---|---|---|
| #1 | Agriculture | |
| #2 | Civil engineering | |
| #3 | Transport | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Horticulture | |
| #2 | Crop agriculture | |
| #3 | Construction of roads | |
| #4 | Street cleaning | |
| #5 | Motor vehicles | |
| #6 | Shafts | |
| #7 | Vehicle connections |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dufty Raymond Jeffrey | 21 |
| #2 | Jeffrey Dufty Raymond | 1 |
| #3 | Raymond Jeffrey Dufty | 1 |
| #4 | Dufty Raymond J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2019047341A1 | Coupling | |
| WO2015081378A1 | Roller cleaning apparatus | |
| NZ629603A | Spiker roller | |
| CA2782966A1 | Idler roller assembly | |
| AU2010306062A1 | Roller cleaning assembly | |
| AU2009202155A1 | Roller assembly | |
| CA2668362A1 | Roller assembly | |
| US2009129865A1 | Rolling apparatus with three undercarriages having smoothing rollers |