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David E. Buttolph
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Fairfax, VT, US
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last 30 patents
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Patent Grant
Maple syrup vaporizer apparatus with hollow shell recirculation arch
Patent number
4,796,602
Issue date
Jan 10, 1989
Small Brothers U.S.A., Inc.
Arthur H. Atkinson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL