TIBURON (CBS SF) — Robin Williams made sure to protect his likeness in death, restricting its use for the next 25-years.

The late actor’s trust spells out restrictions keeping Williams’ voice and likeness from being used by commercial enterprises to sell products.

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The blackout period is unusual among Hollywood stars.

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According to The Hollywood Reporter, holograms of Williams’ comedy routines will also be banned.

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Williams died last August in his Tiburon home.