| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Foundations and excavations | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dougherty John J | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US3333430A | Boot for pipe pile | |
| US3333431A | Cutting shoe for steel sheet piling | |
| US3333429A | H-beam piling | |
| US3333427A | Boot for pilot timber pile | |
| US3333428A | Open end cutting shoe | |
| US3306054A | Skirt type pile driving point | |
| US3295332A | Protective cover for butt ends of timber piles | |
| US3279196A | Pile construction | |
| US3266255A | Drive-fit transition sleeve | |
| US3194022A | Pile shell boot and mandrel plug point assembly | |
| US3131543A | Collapsible piling | |
| US2938355A | Transition sleeve |