| L5722 | Addition, exoskeletal knee-shin system, single axis, pneumatic swing, friction stance phase control |
| L5712 | Addition, exoskeletal knee-shin system, single axis, friction swing and stance phase control (safety knee) |
| L5718 | Addition, exoskeletal knee-shin system, polycentric, friction swing and stance phase control |
| L5716 | Addition, exoskeletal knee-shin system, polycentric, mechanical stance phase lock |
| L5780 | Addition, exoskeletal knee-shin system, single axis, pneumatic/hydra pneumatic swing phase control |
| L5714 | Addition, exoskeletal knee-shin system, single axis, variable friction swing phase control |
