• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F16L - Pipes; joints or fittings for pipes; supports for pipes, cables or protective tubing; means for thermal insulation in general
• F16L 21/04 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members

Patent holdings for IPC class F16L 21/04

Total number of patents in this class: 219

10-year publication summary

Principal owners for this class