| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 | |
| #2 | Canada | 4 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines | |
| #3 | Thermal processes | |
| #4 | Mechanical elements | |
| #5 | Measurement | |
| #6 | Control |
| # | Name | Total Patents |
|---|---|---|
| #1 | Allfree James B | 20 |
| #2 | Hubbell Ira C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US1222588A | Chain-drive motor. | |
| CA138292A | Valve gear | |
| US1002112A | Valve-gear. | |
| CA131926A | Valve gear | |
| US960616A | Valve for engines. | |
| US960615A | Valve for engines. | |
| CA97403A | Valve for engines | |
| US819199A | Locomotive driving-wheel or the like. | |
| US843252A | Locomotive exhaust-nozzle. | |
| US761125A | Compound steam-engine. | |
| US795880A | Compound locomotive. | |
| US801834A | Balanced slide-valve. | |
| US696921A | Reversing mechanism. | |
| US696919A | Oil-filtering and lubricating apparatus. | |
| US696918A | Steam-engine governor. | |
| US696920A | Piston guiding and packing device. | |
| US683424A | Vacuum cylinder-drainage apparatus. | |
| CA62497A | Valve for steam engines | |
| US627887A | Valve-gear and governing mechanism for steam-engines. | |
| US627886A | Valve-gear and governor mechanism for steam-engines. |