• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F03G - Spring, weight, inertia, or like motors; mechanical-power-producing devices or mechanisms, not otherwise provided for or using energy sources not otherwise provided for
• F03G 7/04 - Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature

Patent holdings for IPC class F03G 7/04

Total number of patents in this class: 375

10-year publication summary

Principal owners for this class