| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 27 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Transport | |
| #3 | Civil engineering | |
| #4 | Chemical engineering | |
| #5 | Machine tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Simpson George N | 27 |
| #2 | Simpson Arthur M | 9 |
| #3 | Simpson Walter H | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US2838290A | Material conditioner | |
| US2043780A | Collapsible revolving door | |
| US1742789A | Car feeder | |
| US1781606A | Car dumper | |
| US1686181A | Cylinder-grinding machine | |
| US1587193A | Car hold down | |
| US1630810A | Power mechanism | |
| US1560109A | Hopper and car | |
| US1560108A | Car and unloader | |
| US1553882A | Car dumper | |
| US1565966A | Car dumper | |
| US1558121A | Automatic skip-loading gate | |
| US1530527A | Car dumper | |
| US1509000A | Power mechanism | |
| US1533667A | Car dumper | |
| US1508999A | Car control | |
| US1508998A | Car control | |
| US1630809A | Power mechanism | |
| US1508997A | Automatic car-holding mechanism | |
| US1465006A | Car-holding mechanism |