Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1981-05-04
1983-08-02
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2304
Patent
active
D02699974
REFERENCES:
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patent: D246110 (1977-10-01), Hadtke
patent: D253549 (1979-11-01), Seager
patent: D267114 (1982-11-01), Lynch, Jr. et al.
patent: 3861894 (1975-01-01), Marsh
patent: 3966442 (1976-06-01), Water
patent: 4272261 (1981-06-01), Lynch, Jr. et al.
Largen James R.
Risdon Enterprises, Inc.
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