| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | United States | 4 | |
| #3 | Australia | 3 |
| # | Industry | |
|---|---|---|
| #1 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Crop agriculture | |
| #2 | Planting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Friggstad Terrance | 9 |
| #2 | Friggstad T | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US4487267A | Agricultural apparatus with tool supported thereon and wheel adjustment structure therefor | |
| AU8597582A | Flexible wing frame | |
| US4373455A | Seed boot assembly | |
| CA1153253A | Seed boot assembly | |
| CA1143602A | Flexible wing cultivator and the like | |
| US4355689A | Flexible wing implement with universal hinges and selective locking structure associated with wings thereof | |
| US4249615A | Two-stage trip release shank assembly | |
| CA1099980A | Two-stage trip release shank assembly | |
| CA1092879A | Flexible wing cultivator and the like |