Magnetometer accuracy and use

Magnified dial level indicator with magnetic swing plate

Manually manipulatable gyroscope-stabilized indicating apparatus

Mapping apparatus employing two input axis gyroscopic means

Marine compass and package

Marking plumb bob

Mask compass

Masonry level apparatus

Material dispensing apparatus with line level

Material dispensing apparatus with line level

Means for indicating direction and a method of determining a dir

Means for reducing interference among magnetometer array element

Measuring apparatus

Measuring apparatus for determining the position of the roller a

Measuring device

Measuring device for measuring deviation of body and method...

Measuring instrument

Measuring instruments

Measuring while drilling tool

Mechanical leveling device