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100 bytes added ,  17:25, 9 February 2017
8599 Other Environmental Related
4330 Biotech Processes for Pollution/Toxic Waste Contrl
4340 Biotech Processes for Enhanced Oil Recovery/Mining  See also:*http://vestedlaw.com/wp-content/uploads/2014/08/Patent-Trends-in-the-Cleantech-Industry-Sized.pdf
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