1
Abe Seiderman: Cellular telephone calling system using credit card validation. Robert C Kain Jr, August 27, 1996: US05550897 (62 worldwide citation)

The cellular telephone credit card calling system works in conjunction with a cellular telephone, a local cellular network and an IXC in a telecommunications network. The cellular telephone has a handset and a transceiver unit coupled together by a power and a communications bus. A credit card inter ...


2
Abe Seiderman: Cellular telephone calling system using credit card validation. Robert C Kain Jr, February 7, 1995: US05388148 (57 worldwide citation)

The cellular telephone credit card calling system works in conjunction with a cellular telephone, a local cellular network and an IXC in a telecommunications network. The cellular telephone has a handset and a transceiver unit coupled together by a power and a communications bus. A credit card inter ...