Apparatus for demonstrating the laws of motion

Apparatus for displaying travel path

Apparatus for entertainment and for education which can...

Apparatus for instructing biomechanical movements

Apparatus for interfacing electronic circuits

Apparatus for learning to play a stringed instrument

Apparatus for manually encoding a data record

Apparatus for producing and demonstrating coriolis force

Apparatus for programed instruction and testing

Apparatus for simulating aircraft control loading

Apparatus for simulating interference transmissions

Apparatus for simulating radar displays

Apparatus for simulating the operation of an electrical...

Apparatus for teaching infants how to tie shoe laces

Apparatus for teaching numerical concepts

Apparatus for teaching or testing an applicant

Apparatus for teaching the operation of a keyboard...

Apparatus for the evaluation of coins

Apparatus for the individual and automatic monitoring of...

Apparatus mimicking viscosity of fluids