| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 22 | |
| #2 | Canada | 8 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Machines | |
| #3 | Transport | |
| #4 | Audio-visual technology | |
| #5 | Engines, pumps and turbines | |
| #6 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Matches | |
| #2 | Explosives | |
| #3 | Unspecified technologies | |
| #4 | Wheelchairs and sledges | |
| #5 | Unspecified technologies | |
| #6 | Advertising | |
| #7 | Ignition for internal-combustion engines | |
| #8 | Hand carts | |
| #9 | Devices for public amusement | |
| #10 | Explosive charges |
| # | Name | Total Patents |
|---|---|---|
| #1 | O'Brien James F | 30 |
| Publication | Filing date | Title |
|---|---|---|
| US1968464A | Ignition system tester | |
| US1679170A | Velocipede | |
| US1679169A | Toy vehicle | |
| US1679168A | Adjustable stilt | |
| US1648360A | Advertising game | |
| US1133393A | Automobile-lock. | |
| US1126651A | Cartridge-loading machine. | |
| US1129809A | Cartridge-making machine. | |
| US1132873A | Explosive. | |
| CA154354A | Explosive | |
| US1073279A | Explosive. | |
| CA161972A | Explosive | |
| CA148897A | Explosive | |
| US1071949A | Explosive. | |
| US1070837A | Explosive. | |
| US1071258A | Powder-mill machinery. | |
| US1070836A | Explosive. | |
| US1028952A | Explosive. | |
| US1071257A | Combined powder mixer and granulator. | |
| US1037300A | Explosive. |