- Siladium
Siladium is a trademark for a
stainless steel alloy used injewelry , particularly inhigh school andcollege class ring s.The
trademark was registered in1973 to John Roberts, Inc., maker of the Artcarved brand ofclass ring s. John Roberts, Inc., and the Siladiumtrademark were subsequently acquired by CRC Holdings, Inc., ofAustin, Texas .
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