Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1979-07-16
1981-03-31
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D23 6, D2301
Patent
active
D02587548
REFERENCES:
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patent: 921205 (1909-05-01), Cramer
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patent: 3586244 (1971-06-01), Johnson
patent: 3856038 (1974-12-01), Paul
Addison Carl E.
Comes Rocky J.
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