| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Agriculture | |
| #2 | Thermal processes | |
| #3 | Mechanical elements | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Crop agriculture | |
| #2 | Planting | |
| #3 | Compressed gas holders | |
| #4 | Burners | |
| #5 | Vehicles drawn by animals |
| # | Name | Total Patents |
|---|---|---|
| #1 | Davis Spencer E | 13 |
| #2 | Brennan Thomas Jr | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US939812A | Disk drill. | |
| CA104264A | Scraper for disc drills | |
| US862812A | Drag-bar hanger for seeding-machines. | |
| US898562A | Drill and seeder. | |
| US850999A | Disk drill. | |
| US848291A | Scraper for disk drills. | |
| US811203A | Feeding device for seeders or drills. | |
| US808021A | Scraper for disk drills. | |
| US811703A | Draft-equalizer. | |
| CA89296A | Scraper for disc drills | |
| US785865A | Scraper for disk drills. | |
| CA77736A | Disc drill | |
| US718825A | Disk drill. |