| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 4 | |
| #3 | Austria | 1 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Engines, pumps and turbines | |
| #3 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Vehicle wheels | |
| #2 | Machines for making railways | |
| #3 | Siphons | |
| #4 | Pumps |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dorffel George | 14 |
| Publication | Filing date | Title |
|---|---|---|
| US1210152A | Pump. | |
| US1070949A | Resilient wheel. | |
| US1068865A | Pump. | |
| CA136260A | Sleeper | |
| US1021666A | Sleeper. | |
| US1040173A | Resilient wheel. | |
| US1035556A | Spring-wheel. | |
| GB190919931A | Improvements in Vehicle Wheels. | |
| CA121601A | Vehicle wheel | |
| CA122240A | Rail fastener | |
| US931737A | Rail-fastener. | |
| US967740A | Vehicle-wheel. | |
| CA216144A | Lifeboat |