Cantilever beams , i.e. booms

Official title: Cantilever beams {, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms (for booms with cable suspension arrangements E02F9/14 takes precedence)}; Dipper-arms {, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms}; Bucket-arms {(E02F3/34 takes precedence)}

E02F3/38 (Cantilever beams , i.e. booms) appears on 503 US grants and 371 published applications in this corpus.