Disgraced US cable magnate John Rigas (80) and his son, Timothy, have pleaded not guilty to federal tax-evasion charges.

The pair, who were convicted last year of fraud and conspiracy, having "looted" Adelphia Communications, now stand accused of evading $300 million (€246m; £168m) in income tax when they diverted $1.9 billion in funds from the company for their personal use in 1989.

Judge John E Jones III permitted both men to remain at liberty on their own recognizance and granted a defense request to postpone the tax trial from December to September due to the complexity of the issues involved.

Rigas major and minor are currently also free on bail pending appeal of their convictions, for which they were sentenced to 15 and 20 years in prison respectively.

Adelphia, which collapsed under the scandal, was formerly the fifth biggest cable operation in the US. Its assets have been acquired by media giant Time Warner and number one cable firm Comcast.

Data sourced from multichannel.com; Additional content by WARC staff