CPC Subgroup
F03G 7/119 Full Title
Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for > Alleged perpetua mobilia (using hydrostatic thrust F03B17/04)
F03G 7/119 Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for > Alleged perpetua mobilia (using hydrostatic thrust F03B17/04)