Ferrofluid inclinometer

Ferrofluidic orientation sensor and method of forming the...

Fiber optic angular orientation sensor digital serial encoding

Fiber optic earth rotation gyro compass

Fiber optic position indicator using liquid/air light transmissi

Flange slot magnet mount for an I-beam level

Flexible level

Flexible leveling device

Float biased level apparatus

Floating disk compass

Floating non-gimballed compass

Fluid-actuated level device

Fluid-based acceleration and tilt sensor

Fluidic clinometer control apparatus

Flux valve compass system

Flux-gate sensor mounting and method

Fork level indicator with magnetic dampening means

Forklift mast position indicator

Forming leveling tool

Four way corner level