| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 15 | |
| #2 | Canada | 5 |
| # | Industry | |
|---|---|---|
| #1 | Agriculture | |
| #2 | Packaging and shipping | |
| #3 | Transport | |
| #4 | Measurement | |
| #5 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Planting | |
| #2 | Transport or storage devices | |
| #3 | Railway shifting | |
| #4 | Mixing | |
| #5 | Measuring length, angles and areas | |
| #6 | Load transportation vehicles | |
| #7 | Containers for goods storage |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hoffstetter George O | 20 |
| Publication | Filing date | Title |
|---|---|---|
| US2939592A | Bulk feed body | |
| US2738960A | Mixing and blending machine | |
| US2633255A | Twin screw conveyer | |
| US2614708A | Cement conveyer | |
| US2620916A | Combined hopper and delivery conveyer | |
| US2488407A | Conveyer drive attachment | |
| US2500682A | Adjustable shield | |
| US2500681A | Lateral spreader | |
| US2520405A | Portable pit | |
| US2543288A | Fertilizer spreader | |
| US2543287A | Conveyer and heater therefor | |
| US2340810A | Material spreader | |
| US2327266A | Material spreading device | |
| US2293977A | Material spreading device | |
| US1631682A | Measuring device | |
| CA521632A | Conveyor and heater | |
| CA462609A | Adjustable shield | |
| CA462608A | Lateral spreader | |
| CA487353A | Fertilizer spreader | |
| CA636710A | Bulk feed body |