Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1978-07-19
1981-05-19
Largen, James R.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D2304
Patent
active
D02592770
REFERENCES:
patent: D246378 (1977-11-01), Mueller
patent: D246379 (1977-11-01), Mueller
patent: 2549547 (1951-04-01), Trask
patent: 2917128 (1959-12-01), Tatay
patent: 2978978 (1961-04-01), Sweedyk et al.
patent: 3296820 (1967-01-01), Bauman
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