• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F01L - Cyclically operating valves for machines or engines
• F01L 1/348 - Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear by means acting on timing belts or chains

Patent holdings for IPC class F01L 1/348

Total number of patents in this class: 15

10-year publication summary

Principal owners for this class