One of the more significant patents to emerge from Cross Gates was number 313720 registered in 1928 the name of the company, Mr C.H Roe and Mr William Bramham, the works manager who was later to be general manager at Eastern Coach Works at Lowestoft, Northern Coachbuilders of Newcastle upon Tyne and Saunders-Roe of Beaumaris. This concerned a continuous machined teak waist rail designed to double-interlock with the vertical teak pillars and the steel reinforcing strips, once assembled also binding those to the outer panels; it could be accurately described as an early example of system-built coachwork. New chassis makes bodied in the late 1920s included Albion and Crossley, both of whom chose Roe bodies for demonstrators, in Crossley's case for its first double-decker. Trolleybuses continued to figure, makes including Karrier-Clough and Guy, the three-axled double deck now being the common form for these, customers including Bloemfontein, South Lancashire Transport and corporation fleets including some detailed above, Doncaster for example taking one of the only two Bristol trolleybuses with a Roe body in 1928.