Dry cells; batteries and photovoltaic cells; accumulators; lithium-ion batteries; photovoltaic cells; wet cells; high tension batteries; chargers for electric batteries; uninterruptible electric power supplies; emergency electric power supplies; portable electric power supplies; solar batteries; accumulator jars; electric capacitors; condensers; AC-AC converters and AC-DC converters; power distribution or control machines and apparatus, namely, electrical power distribution blocks; rotary converters; phase modifiers in the nature of optical phase shifters; measuring or testing machines and instruments, namely, sound level meters, fuel pump testers; measuring or testing machines and instruments for electromagnetic wave, namely, electromagnets; measuring or testing machines and instruments for electricity and magnetism, namely, electrical outlet tester; telecommunication machines and apparatus, namely, telecommunication switches; electronic machines and apparatus, namely, electronic machines for reading credit cards and recording financial operations; computer software for use in database management, use as a spreadsheet, word processing; blank magnetic data media; magnetic cores; resistance wires; fuel cell electrodes