The Cosby Show star is facing felony charges of aggravated indecent assault, amid allegations he drugged and sexually assaulted former Temple University employee Andrea Constand at his home in Pennsylvania in 2004.

At a preliminary hearing earlier this year (16), detectives read a statement Constand had given to authorities in 2005, prompting Cosby's lawyers to file an appeal, arguing they should have been allowed to cross-examine the alleged victim in court to determine if there was enough evidence for the case to proceed.

Earlier this month (Jul16), Judge Steven O'Neill refused to dismiss the criminal case against him, and ruled the actor does not have the right to confront his accuser at a preliminary hearing, while also stating Constand's police testimony provided enough evidence to bring the case to trial. But the judge insisted Constand must appear and testify at the trial, for which a date has yet to be set.

On Wednesday (20Jul16), the comedian's lawyers filed a notice of appeal and requested for officials at Pennsylvania's Superior Court to overturn the ruling and make Constand sit for questioning during a new preliminary trial. His legal team is arguing his constitutional rights have been violated because he is unable to confront his accuser.

"The issues presented here are matters of great public interest that relate to safeguarding of basic constitutional/and human rights and they raise important constitutional questions that go to the heart of due process," reads the appeal.

The veteran comedian has been accused of rape, drugging and/or performing inappropriate sex acts by over 50 women. He has denied all allegations.