| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 7 | |
| #2 | Switzerland | 6 | |
| #3 | Germany | 1 | |
| #4 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Cylinders for combustion engines | |
| #2 | Internal-combustion piston engines | |
| #3 | Rotary-pistons | |
| #4 | Machines | |
| #5 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Laraque Roland | 8 |
| #2 | Roland Laraque | 6 |
| Publication | Filing date | Title |
|---|---|---|
| CA306885A | Hydraulic ram | |
| CA495321A | Piston for internal combustion motor | |
| CA587011A | Piston for internal combustion engine | |
| CA556817A | Opposed pistons internal combustion engine | |
| CA313915A | Rotary air compresser | |
| CA276024A | Pump | |
| CA504394A | Internal combustion engines with opposed pistons |