| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 18 | |
| #2 | Canada | 6 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Transport | |
| #5 | Medical technology | |
| #6 | Engines, pumps and turbines | |
| #7 | Mechanical elements | |
| #8 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Separating solids | |
| #2 | Unspecified technologies | |
| #3 | Guiding railway traffic | |
| #4 | Ignition for internal-combustion engines | |
| #5 | Operating tables | |
| #6 | Nails | |
| #7 | Unspecified technologies | |
| #8 | Metal-working | |
| #9 | Milling | |
| #10 | Harvesting |
| # | Name | Total Patents |
|---|---|---|
| #1 | Johnson Harry L | 24 |
| #2 | Johnson Louis J | 1 |
| #3 | Britton William H | 1 |
| #4 | Sorenson Andrine | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2800838A | Tracer guide | |
| US2723597A | Die sinker | |
| US2427461A | Hydraulic tractor loader | |
| US2354378A | Screen cleaner for corn sizing apparatus | |
| US2354377A | Corn grading apparatus | |
| US2354376A | Corn sizing apparatus | |
| US2317615A | Countersink stop | |
| US2313150A | Grain separator catch and return device | |
| US2203152A | Grain separator | |
| US2135343A | Grain separator | |
| US2087669A | Engine control | |
| US1912375A | Grain cleaning and separating machine | |
| US1762632A | Grain separator | |
| US1596044A | Split anchor socket | |
| US1202528A | Stretcher. | |
| CA157602A | Carton sealing machine | |
| US1096918A | Carton making and sealing machine. | |
| US880218A | Signal mechanism for block-signal systems. | |
| US832548A | System of railway signaling. | |
| CA280284A | Grain separator |