India, Nov. 14 -- A Denny's restaurant in San Jose, California, has removed a commemorative sign celebrating Nvidia's founding, days after co-founder Jensen Huang resigned as the chipmaker's chief executive amid a growing controversy over his personal relationships and allegations involving a woman suspected of having links to Chinese intelligence.

The employees at the roadside diner confirmed that the sign was no longer there when reporters visited on Thursday, NBC News reported. The restaurant did not disclose who had removed it or explain why.

The sign commemorated the booth where Huang and Nvidia co-founders Chris Malachowsky and Curtis Priem discussed starting the company in 1993. It had become a symbol of Nvidia's beginnings, long...