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Jul 8, 2015 US Patent US No. 6,158,591, Canadian Patent No. 2,321,815 titled “Method and Apparatus for Extracting Plant Resins” is owned by Reinhard Delp and is presumed in law to be valid.
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Jan 18, 2017
US Patent US No. 6,158,591, Canadian Patent No. 2,321,815 titled “Method and Apparatus for Extracting Plant Resins” is owned by Reinhard Delp and is presumed in law to be valid.

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