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Source: [http://www.epo.org/index.html European Patent Office]
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==Filtration (by process)==
The technical classification for filtration techniques by process-type is as follows:
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Source: [http://www.epo.org/index.html European Patent Office]
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==Filtration (by medium)==
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Source: [http://www.epo.org/index.html European Patent Office]
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==Post Filtration==
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Source: [http://www.epo.org/index.html European Patent Office]
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'''From here on, the report will focus only on Filtration techniques.'''