Quantum hall systems consisting primarily of superconducting magnets, printed circuit boards (PCB) for generating quantum effects, room temperature resistance bridges, and hardware or magnet cooling dewars; current range extenders, namely, DC current sources in the nature of capacitors from 150 mA to 10,000 A and current comparator designed for higher currents and current sources, namely, DC current sources in the nature of capacitors from 150 mA to 10,000 A; current transformers; voltage div...

ELECTRICAL MEASURING INSTRUMENTS AND STANDARDS AND PARTS THEREOF-NAMELY, [ POTENTIOMETERS;] BRIDGES FOR MEASUREMENT OF RESISTANCE, CAPACITANCE, INDUCTANCE TEMPERATURE; [ GALVANOMETERS; PHOTOCELL GALVANOMETER AMPLIFIERS; ] STANDARDS OF VOLTAGE AND RESISTANCE, FOR STANDARDS LABORATORIES; CONSTANT TEMPERATURE OIL BATHS AND AIR BATHS; [ TRANSFORMER CALIBRATION EQUIPMENT; AND SPECIAL PURPOSE PRESS BUTTON AND ROTARY SWITCHES FOR USE WITH THE AFOREMENTIONED PRODUCTS]

Current sources, namely, batteries; power analyzers; voltage dividers; Null detectors, namely, comparators

Electrical measuring instruments and standards and parts thereof, namely, resistance bridges and current range extenders for measuring resistance, temperature bridges, teraohmmeters, precision current transformers, impedance measurement systems comprised of phase sensitive detectors, current comparators, and AC bridges; high voltage capacitance bridges, thermometers, AC-DC transfer standards, transconduct amplifiers, watt meters, volt meters, potentiometers, ohmmeters, inductive dividers for ...