| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 23 | |
| #2 | Canada | 2 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Civil engineering | |
| #3 | Machines | |
| #4 | Engines, pumps and turbines | |
| #5 | Measurement | |
| #6 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Unspecified technologies | |
| #3 | Venting or aerating devices | |
| #4 | Pumps | |
| #5 | Pistons and sealings | |
| #6 | Weighing | |
| #7 | Unspecified technologies | |
| #8 | Clutches and brakes | |
| #9 | Racing equipment | |
| #10 | Swimming pools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Macclatchie John W | 10 |
| #2 | Leathers Clarence H | 6 |
| #3 | Shellman Roy K | 5 |
| #4 | Deakins Grover C | 1 |
| #5 | Phillips Porter L | 1 |
| #6 | Bryant Steele | 1 |
| #7 | Shellman Compton Roy K | 1 |
| #8 | Cater Earl E | 1 |
| #9 | Von Almen Russell S | 1 |
| #10 | Raphael Harold A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2898082A | High pressure pump valve | |
| US2862739A | Shaft coupling device | |
| US2821730A | Cable wiper | |
| US2883693A | Pipe wiper | |
| US2888238A | Pump valves | |
| US2792016A | High pressure pump valves | |
| US2865663A | Pump rod assembly | |
| US2414984A | Starting gate | |
| US2309210A | Platform supporting means | |
| US2309211A | Rotatable dial for determining amount of weight on formation | |
| US2200337A | Drill bit | |
| US2204142A | Gate valve | |
| US2144682A | Blow-out preventer | |
| US2159540A | Blowout preventer | |
| US2144736A | Packing | |
| US2099169A | Sealing means | |
| US2112592A | Valve | |
| US2035818A | Plug valve | |
| US2051262A | Piston | |
| US2049450A | Expansible cutter tool |