Karl Meier (spelled Carl in this article) is mentioned here:
http://www.lvstriphistory.com/ie/thun48.htm

Scroll to near the bottom and look for In December of 1963...

"In December of 1963, some individuals were listed as: Carl Maier/Herbert Manheim - Co-Managers; "

The listing for the business card chip you mentioned is here:
http://www.ebay.com/itm/RARE-1960S-THUNDERBIRD-HOTEL-1-CASINO-CHIP-KARL-MAIER-LAS-VEGAS-NEVADA-/272513928008?hash=item3f73188b48:g:An4AAOSwopRYcWNc