| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 29 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Mechanical elements | |
| #5 | Packaging and shipping | |
| #6 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Pumps | |
| #3 | Pistons and sealings | |
| #4 | Unspecified technologies | |
| #5 | Unspecified technologies | |
| #6 | Venting or aerating devices | |
| #7 | Cooling of machines | |
| #8 | Handling thin material | |
| #9 | Horticulture | |
| #10 | Cylinders for combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Macclatchie John W | 29 |
| Publication | Filing date | Title |
|---|---|---|
| US2748718A | Pump and piston combination | |
| US2743972A | Piston | |
| US2519144A | Combination piston and rod | |
| US2576025A | Pump piston | |
| US2550487A | Rod wiper | |
| US2443110A | Pump piston | |
| US2440180A | Gripping means for removing trees | |
| US2480488A | Wire line guide | |
| US2210984A | Means for perforating well casings | |
| US2210983A | Method and means for perforating well casings | |
| US2132794A | Internal combustion engine | |
| US2148702A | Heat transferring means | |
| US2028910A | Reamer | |
| US2074702A | Power unit | |
| US1882434A | Piston | |
| US1822444A | Cementing head | |
| US1910805A | Brake | |
| US1882433A | Valve seat | |
| US1903467A | Protector for drill pipe and the like | |
| US1772871A | Well cementing |