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A comment on DARPA Has Open-Sourced 'Dark Web' Search Tech. Parent comment

Re:DARPA Has Open-Sourced 'Dark Web' Search Tech by farresito on Sunday April 19, 2015 @02:40PM (#9404239)
Do they patent the important parts from their search engine? I thought they just kept it secret.
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Re:DARPA Has Open-Sourced 'Dark Web' Search Tech by SolarNet on Sunday April 19, 2015 @07:54PM (#9405376)
For example PageRank - the core algorithm - is patented [0].

[0] http://www.google.com/patents/US6285999

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Re:DARPA Has Open-Sourced 'Dark Web' Search Tech by schoen on Monday April 20, 2015 @12:57PM (#9409360)
Is that still an ongoing trend?
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