The veteran actor, who was arrested last December (15), is facing three charges of felony indecent assault amid allegations he drugged and sexually assaulted former Temple University employee Andrea Constand at his Pennsylvania home in 2004.

He was not charged at the time of the incident and maintains his innocence, but he faced questioning in 2005 and 2006 as part of Constand's civil suit, which was subsequently settled out of court.

The case was reopened last year (15) after the star's sealed deposition was made public, revealing Cosby had confessed to buying sedatives to give to women he wanted to sleep with.

The Cosby Show comedian's representatives have repeatedly tried to have the case thrown out and they filed their latest request for dismissal in October (16), arguing the comedian is unable to properly defend himself in the case as he is "legally blind" and suffers from failing memory.

The motion was denied by Montgomery County Judge Steven O'Neill during a hearing on Wednesday (16Nov16), reports

The judge also refused two other requests from Cosby's team, including competency tests for the actor's other alleged sex assault victims, who prosecutors plan to call as witnesses.

Another ruling to determine whether Cosby's testimony from his previously settled civil suit with Constand can be used against him in the criminal case is due to be made before the embattled star's next court dates on 13 and 14 December (16).

The 79-year-old is tentatively set to stand trial in June (17).