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An exception is the United States, where patents filed prior to 8 June 1995 expire 17 years after the publication date of the patent, but application extensions make it possible for a patent to issue much later than normally expected (see submarine patents). The various MP3-related patents expire on dates ranging from 2007 to 2017 in the U.S. Patents filed for anything disclosed in ISO CD 11172 a year or more after its publication are questionable. If only the known MP3 patents filed by December 1992 are considered, then MP3 decoding has been patent-free in the US since 22 September 2015 when U.S. Patent 5,812,672 expired which had a PCT filing in October 1992. If the longest-running patent mentioned in the aforementioned references is taken as a measure, then the MP3 technology will be patent-free in the United States on 30 December 2017 when U.S. Patent 5,703,999, held by the Fraunhofer-Gesellschaft and administered by Technicolor, expires.

How long does it take for patents to expire in the United States?
Answer: 17 years after the publication date
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Queen composed music that drew inspiration from many different genres of music, often with a tongue-in-cheek attitude. The genres they have been associated with include progressive rock, symphonic rock, art rock, glam rock, hard rock, heavy metal, pop rock, and psychedelic rock. Queen also wrote songs that were inspired by diverse musical styles which are not typically associated with rock groups, such as opera, music hall, folk music, gospel, ragtime, and dance/disco. Several Queen songs were written with audience participation in mind, such as "We Will Rock You" and "We Are the Champions". Similarly, "Radio Ga Ga" became a live favourite because it would have "crowds clapping like they were at a Nuremberg rally".

Which two Queen songs were written with audience participation in mind?
Answer: "We Will Rock You" and "We Are the Champions"
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IBM has been a leading proponent of the Open Source Initiative, and began supporting Linux in 1998. The company invests billions of dollars in services and software based on Linux through the IBM Linux Technology Center, which includes over 300 Linux kernel developers. IBM has also released code under different open source licenses, such as the platform-independent software framework Eclipse (worth approximately US$40 million at the time of the donation), the three-sentence International Components for Unicode (ICU) license, and the Java-based relational database management system (RDBMS) Apache Derby. IBM's open source involvement has not been trouble-free, however (see SCO v. IBM).

What is a notable legal case involving open source and IBM?
Answer:
SCO v. IBM