• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F22B - Methods of steam generation; steam boilers
• F22B 21/14 - Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially-straight water tubes involving a single upper drum and two or more lower drums

Patent holdings for IPC class F22B 21/14

Total number of patents in this class: 3

10-year publication summary

Principal owners for this class