Laboratory equipment, namely, Vande Graaf generators for use in educational institutions; Tesla coils; electric and steam motors for use in educational institutions; gyroscopes; magnets; material samples consisting of aluminum, brass, carbon, polyethylene, copper, steel, nylon, polyetrafluoroethylene (PTFE) resins, homopolymer acetal (POM-H) and wood for density testing, Leyden jars for use in educational institutions, electroscopes; Faraday cages for use in educational institutions; voltaic ...

Electric coils, namely, Tesla coils; gyroscopes; magnets; capacitors, namely, Leyden jars for use in educational institutions, measuring apparatus, namely, electroscopes for measuring electricity; electric cells, namely, voltaic cells; electric circuits, namely, Wheatstone bridges for use in educational institutions; electric resistors; thermostats; calorimeters; component parts of precision balances, namely, weights; timers; Instruments for detecting and measuring two-dimensional distributio...

microscopes, telescopes, micrometers, scales and parts therefor