Lighted plumb bob
Lighted plumb bob
Line level
Line level
Line level apparatus
Liquid level and angle detector
Liquid level indicator for a tilted container
Liquid level vial and method for making the vial
Liquid leveling device
Long-term navigation method and device
Low cost electronic compass with 2D magnetometer
Low power tiltmeter electronics with compensation for bubble lev
Low profile compass with removable protective cover and...
Low profile compass with removable protective cover and...
Low profile plumb bob assembly
Luminescent indication compass