Foundation Patents (Class 405/229)
- Process or apparatus for installing (Class 405/232)
- Comprising series of connected longitudinal sections having diverse compositions (Class 405/250)
- With joint or connection between sections of similar material (Class 405/251)
- Pile having screw threads (Class 405/252.1)
- With driving or cutting tip (Class 405/253)
- With end cap (Class 405/255)
- Concrete (Class 405/256)