Joan Pearce Research Associates
Joan Pearce Research Associates is a private research library founded by Joan Pearce that specializes in legal clearances and fact-checking for the entertainment industry. They provide:
 Errors & Omissions Reports for film and television scripts 
 Background & Authenticity information 
 Production Research 
 Translation Services 
 Music Clearance 
 Interactive Media 
 Contacts for Rights & Permissions including: Products, Photos, Film Clips, Celebrities, Intellectual Properties, Literary Quotations 

Joan Pearce was used during the production of  and  to perform the above for that show's scripts. (The Making of Star Trek: Deep Space Nine, pp. 135 & 136; A Vision of the Future - Star Trek: Voyager, pp. 199 and 287-288)

The company has also worked on films such as In the Mouth of Madness, You Can Count on Me, Sexy Beast, Hedwig and the Angry Inch, Dark Blue, Monster, Hotel Rwanda, Grandma's Boy, Underworld: Evolution, and Crank, generally providing research and script clearances.

External links 
  – official site
 
Production companies