(under the class definition) Subject matter wherein the amplifying device combines (1) a substance having the characteristic that certain molecular, atomic, or nuclear particles thereof are capable of excitation to a higher energy level; (2) means to raise such particles to the higher energy level state; (3) means for applying an electrical signal to the amplifying device; and (4) means for securing the amplified output therefrom, whereby the aforementioned excited particles in undergoing a change from the higher to a lower energy state emit radiation which is released by the applied electrical signal, thereby to amplify it.
SEE OR SEARCH CLASS
250, Radiant Energy,
251, for devices for producing and propagating a unidirectional stream of neutral molecules or atoms through a vacuum, usually at thermal velocity and including means to excite the molecules or atoms at a resonant frequency.
324, Electricity: Measuring and Testing,
300+, for electrical measuring and testing means involving nuclear induction, which refers to operation on a nuclear resonant principle similar to that employed in masers. 327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, appropriate subclasses for miscellaneous circuits which may utilize a maser type circuit.
331, Oscillators,
94.1, for oscillators of the molecular or particle resonant type, e.g., maser type.
332, Modulators, appropriate subclasses for modulators of the molecular or particle resonant type, e.g., maser type.
333, Wave Transmission Lines and Networks,
24, for gyrator type wave transmission coupling means, including devices operating on a molecular or nuclear resonant principle similar to that employed in masers.
359, Optics: Systems (Including Communication) and Elements,
333+, for optical or quasi-optical maser-type amplifying devices.
