Heat recovery unit

Details Heat recovery unit Heat recovery unit

1991-07-08

1994-08-02

Burke, Wallace R.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

D23386

Patent

active

D03493334

REFERENCES:
patent: 48540 (1865-07-01), Edwards
patent: D264500 (1982-05-01), Beaton
patent: D287047 (1986-12-01), Nygren
patent: 3334400 (1967-08-01), Jaeger
patent: 3913663 (1975-10-01), Gates
patent: 4381819 (1983-05-01), Paolino
patent: 4437513 (1984-03-01), Castiglioni
patent: 4475530 (1984-10-01), Albertson

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