US Patent 7934459 Ergonomic workstation with raising and lowering elements

Ergonomic workstations include devices with raising and lowering elements, such as tables and desks. The devices include one or more legs, and when more than one leg is present, each leg is substantially parallel to the other legs. Each leg is provided with a base for attaching the leg to another or to multiple other legs. The devices further include one or more sub-surfaces for connecting one or more of the legs and one or more top surfaces. The substructure is provided with more than one arrangement of hole patterns for attaching the top surface and/or the legs. In some aspects, the devices include two top surfaces which are raised or lowered by actuators in the legs. The plurality of legs can either maintain the second top surface at a constant height, or can raise and lower the second top surface independent of the first top surface.