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Patent US3823570A Heat pump
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- Full Patent: https://patents.google.com/patent/US3823570A
- Abstract Method and apparatus for utilizing for the purpose of heat flow by means of controlled temperature change a field energy, other than electric, magnetic or gravitational field energies, capable of reducing the specific heat properties of a broad class of substances.
- 1973-02-16: Application filed by H Wallace
1991-07-16: Application status is Expired - Lifetime