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Joker 3D

as The Sigmaster

1
Stan Sigman Stan Sigman

Birthday

1947-03-31

Place of Birth

Lubbock, Texas, USA

Biography

Stanley T. Sigman (March 31, 1947 - December 21, 2020) was the former Chief Executive Officer of Cingular Wireless at AT&T, the United States's largest wireless provider.
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