Phil Goldman, a Silicon Valley engineer who co-founded WebTV, died Friday, according to the Santa Clara County coroner's office. He was 39.
The cause of his death may take several weeks to determine, the coroner's office said.
Throughout his career, Mr. Goldman worked on the cusp of technology and consumer electronics at firms such as Apple Computer and Microsoft Corp.
In 1995, along with former Apple colleagues Steve Perlman and Bruce Leak, Mr. Goldman co-founded WebTV Networks, which allowed users to surf the Internet from their televisions.