Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Element or attachment – not elsewhere specified
Patent
1993-02-25
1995-02-07
Lichtenstein, Lisa P.
Environmental heating and cooling; fluid handling and sanitary e
Heating or cooling
Element or attachment, not elsewhere specified
D15 5
Patent
active
D03552535
REFERENCES:
patent: 1873974 (1932-08-01), Meyer
patent: 4236871 (1980-12-01), Hirst et al.
patent: 4428717 (1984-01-01), Catterfeld
patent: 5192193 (1993-03-01), Cooper et al.
Griffith John M.
Jansen Willem
Myrick Bradford R.
Pancygrau Steve H.
Lichtenstein Lisa P.
Minns Michael H.
Northern Research & Engineering Corporation
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