| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 9 | |
| #2 | United States | 9 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Transport | |
| #4 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Street cleaning | |
| #2 | Dredging | |
| #3 | Unspecified technologies | |
| #4 | Planting | |
| #5 | Motor vehicles | |
| #6 | Construction of roads |
| # | Name | Total Patents |
|---|---|---|
| #1 | Niemela Cal G | 18 |
| #2 | Quenzi Philip J | 15 |
| #3 | Niemela Curt E | 6 |
| #4 | Lahti Terry L | 2 |
| #5 | Lahti Edward R | 1 |
| #6 | Niemela Nels A | 1 |
| #7 | Lahti Eward R | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA2469600A1 | Material spreading device | |
| US6393737B2 | Plow support assembly | |
| US6412199B1 | Adjustable wing plow with fixed pivot | |
| US6442877B1 | Plow with rear mounted, adjustable wing | |
| US6408549B1 | Adjustable wing plow | |
| US6178669B1 | Plow hitch assembly for vehicles | |
| CA2229783A1 | Adjustable wing plow | |
| US5899007A | Adjustable wing plow | |
| US5638618A | Adjustable wing plow |