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Ronald D. Smith
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Petaluma, CA, US
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last 30 patents
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Patent Grant
Micro-climate temperature control apparatus
Patent number
4,577,435
Issue date
Mar 25, 1986
Edward A. Springer
A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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Patent Grant
Apparatus and method for heating the root zone of plants
Patent number
4,411,101
Issue date
Oct 25, 1983
Edward A. Springer
A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING