(under subclass 509) Subject matter wherein the external effect involves a magnetic field.
SEE OR SEARCH CLASS
257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes),
421+, for a magnetic responsive semiconductor element, per se.
307, Electrical Transmission or Interconnection Systems,
401+, for nonlinear reactor systems including magnetic reactors.
324, Electricity: Measuring and Testing,
244+, and particularly subclasses 250 and 252 for magnetometers with indicators. 330, Amplifiers,
4.8, for gyromagnetic parametric amplifiers, subclass 6 for amplifiers with Hall effect type means, subclass 8 for saturable reactor type amplifiers, subclasses 47+ for magnetically influenced discharge device amplifiers, subclass 60 for magnetrostrictive type amplifiers and subclass 63 for amplifiers with magnetic means generally.
331, Oscillators,
5, and 86+ for magnetron oscillators, subclasses 6, 83, and 84 for Klystron oscillators and subclass 67 for oscillators with electromagnetic or electrostatic shielding.
338, Electrical Resistors,
32, for resistance means whose value depends upon an applied magnetic field and see also the search notes thereunder.
341, Coded Data Generation or Conversion,
15, for a magnetic digital pattern reading converter.
