Class [009]
Computer & Software Products & Electrical & Scientific Products

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 distribution of force and pressure, namely, force tables; pendulums; magnifying lenses; laboratory kits for the plotting of electrical fields comprising electrical conductors in the nature of conductive paper, graph paper, electrodes, electrical conductors in the nature of electricity conductive inks, conductive paper, cork boards; laboratory electromagnetic kits comprising iron cores, iron filings and magnets; laboratory kits for the construction of electric voltaic cells comprising electrodes of copper, iron, zinc and aluminum; laboratory kits for determining mass, density and specific gravity comprising test weights in the nature of cubes and cylinders of metals, plastic and wood; laboratory chemistry teaching aids, namely, laboratory ware comprising test tubes, distillation apparatus for scientific purposes, acetylene burners, and scales; laboratory biology teaching aids, namely, microscopes and laboratory equipment in the nature of electric bath heaters; laboratory mathematical teaching aids, namely, directional compasses, protractors, graduated rulers and calculators; barometers; telescopes; micrometers; laboratory glassware, namely, burettes; laboratory equipment, namely, crucibles; hydrometers; incubators for incubating bacterial growth; laboratory equipment, namely, Petri dishes; laboratory equipment, namely, microscope slides; electronic spectrophotometers for use in identifying and measuring colors; laboratory glassware, namely, titrators; stills for scientific purposes; refractometers