<P> The Motorola Bag Phone is the colloquial name for a line of personal transportable cellular telephones manufactured by Motorola, inc. from 1990 to 2000 . </P> <P> Motorola introduced the Bag Phone line in 1990 . These phones offered more durability and higher power output (up to 3 watts) than more conventional cell phones of the time, such as Motorola's own DynaTAC and MicroTAC handheld phones, making them popular for truckers, boaters, and people in rural areas . Because of their durability, many examples of these phones are still in working order today . </P> <P> The Bag Phones are a derivative of the Motorola Tough Talker series of transportable phones, which in turn descended from the DynaTAC car phones introduced in 1984 . All of these phones feature a modular design in which the handset attaches to the transceiver, which is then powered by either a vehicle's power system (in the car phones) or a battery pack (in the transportables). By reducing the size and weight of the transceiver and battery pack, and introducing more fashionable leather bags in which to contain them, Motorola was able to make them more marketable to the average cellular phone consumer, and hence the Bag Phone . </P>

When was the first bag cell phone invented
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