Abstract: An earphone/car audio system dual receiving mode type cellular telephone hand-free handset for use with a cellular telephone in a car in which a selector switch is provided and selectively switched between a car audio system receiving mode where the voice output signal is transmitted to a radio transmitter circuit that modulates the signal and then transmit the signal to the car audio system by radio for broadcasting, and a earphone receiving mode where the voice output signal is transmitted to the earphone for the user only and the battery power circuit is cut off from the radio transmitter circuit.

Abstract: A cellular telephone bag having a base sheet made of genuine leather or synthetic leather, and a layer of aluminum sheet material bonded to the base sheet and adapted to shield the radiation of magnetic waves of the cellular telephone held in the cellular telephone bag.

Abstract: An EMI protective device shell having a covering layer of aluminum foil bonded to the smooth outside wall of the plastic shell body thereof and a layer of transparent protective coating spray-painted on the covering layer of aluminum foil.

Abstract: A supporting clip device for associating with a housing or a leather case of a mobile telephone or pager. The clip device includes a clip member and a foldable/stretchable support member which can be pivoted from the clip member through a certain angle so as to support the mobile telephone or pager at a position 45 degrees inclined to a plane surface for achieving better signal receiving ability and appearance.

Abstract: To prevent over charging of a battery the battery voltage is detected during charging and when a decrease in voltage, which occurs just after full charge, is detected the charger is switched off. The battery voltage may be monitored by a dual slope integrator 30 and a central processor 10 indicates the status of the battery on a display 50. During discharge the voltage drop across a resistor R connected between the battery and load is monitored by integrators 30, 40 and processor 10.

Abstract: A set of equipment for playing golf. The set includes a full set of golf club heads, i.e., irons 404 and woods 405; a shaft 101 capable of ready disassembly or assembly of a selected head, e.g.