Abstract: The present invention uses an electromagnetic device for amplifying an input signal without the use of amplifiers, power supplies, and inverter/converter circuits. The present invention routes an input signal through an electromagnetic device for amplification of the input signal for later use by various loads.

Abstract: A rectangular piece of printed paper which is put in the U.S. mail service by a person who has furnished goods or services to the person to whom the paper is mailed and the person to whom the paper is addressed returns by U.S. mail the paper to the original sender enclosing payment for the goods or services.

Abstract: Shower apparatus (1) heated by solar apparatus radiation (3) used in open spaces, made of any type of material, and installed in a substantially vertical position, which comprises the structural configuration of the apparatus in addition to act as accumulation container (2) of water heated by sunbeam (3), so that the vertical cylinder (2) made of rigid material is used both as an accumulator storage of hot water and as a carrier structure for the apparatus. The storage cylinder may be coated with a protection cover which avoids the cooling produced by ambient air.

Abstract: This disclosure pertains to a public address apparatus comprising a portable dual track tape recorder -- playback unit having individual stationary electromagnetic dual purpose recording and playback heads feeding selectively independently the input of a single channel audio amplifier and speaker system. The audio amplifier is provided with two additional output terminals, each of which is independently capable of providing recording currents to each recording head as desired. Additional inputs are provided accommodating microphones and radio receivers.