In September 1998, the Fraunhofer Institute sent a letter to several developers of MP3 software stating that a license was required to "distribute and/or sell decoders and/or encoders". The letter claimed that unlicensed products "infringe the patent rights of Fraunhofer and Thomson. To make, sell and/or distribute products using the [MPEG Layer-3] standard and thus our patents, you need to obtain a license under these patents from us." COUNT 4
QSN1 When did the Fraunhofer institute send out a letter? ANS1 September 1998 QSN2 What did the letter claim would be required to distribute and/or sell decoders and/or encoders? ANS2 a license QSN3 What does selling unlicensed products mean that the seller is doing? ANS3 infringe the patent rights of Fraunhofer and Thomson QSN4 What can products not use if they want to avoid infringing on patent rights? ANS4 the [MPEG Layer-3] standard