Variable bore packer for a ram-type blowout preventer

Variable bore ram

Variable choke for use in a subterranean well and method of...

Variable choke valve

Variable combination module

Variable conductivity trafficked surface for permafrost regions

Variable connectors for angling modular wall systems

Variable contour floor system

Variable controlled guide device for wireline spooler

Variable counterbalance for vertical lift doors

Variable curvature and/or pitch stairway handrail

Variable damper for bridges

Variable decorative treatment

Variable depth grooved drill string member

Variable diameter earth boring bit

Variable discharge mechanism for hopper spreader apparatus

Variable discharge surge feeder and bolter

Variable downhole choke

Variable drive mechanism for the panel of a gate or similar...

Variable eccentric vibratory hammer