| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 9 | |
| #2 | United States | 5 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Machines | |
| #2 | Servomotors | |
| #3 | Rail vehicle suspensions |
| # | Name | Total Patents |
|---|---|---|
| #1 | Stafford Hal R | 14 |
| #2 | Mohun John L | 1 |
| #3 | Rennie Robert | 1 |
| #4 | Ball Herman F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA176794A | Locomotive engine | |
| CA169129A | Valve for compound engines | |
| CA167300A | Locomotive truck | |
| US1175087A | Intercepting-valve for compound engines. | |
| CA161698A | Car truck | |
| CA159867A | Steam engine valve reversing gear | |
| US1114061A | Car-truck. | |
| US1077862A | Steam-engine valve-reversing gear. | |
| CA152099A | Compound locomotive | |
| CA152100A | Locomotive | |
| US1066334A | Compound locomotive. | |
| US1066232A | Compound locomotive. | |
| CA122870A | Locomotive | |
| CA197599A | Lateral thrust bearing |