• All sections
• B - Performing operations; transporting
• B66B - Elevators; escalators or moving walkways
• B66B 1/20 - Control systems without regulation, i.e. without retroactive action electric with devices, e.g. push-buttons, for indirect control of movements with means for storing pulses controlling the movements of several cars or cages and for varying the manner of operation to suit particular traffic conditions, e.g. "one-way rush-hour traffic"

Patent holdings for IPC class B66B 1/20

Total number of patents in this class: 133

10-year publication summary

Principal owners for this class