Heat saving device

Details Heat saving device Heat saving device

1983-06-20

1985-04-30

Kemper, Catherine E.

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

Patent

active

D02786524

REFERENCES:
patent: 386978 (1888-07-01), Gran
patent: 1785649 (1930-12-01), Rich
patent: 2147658 (1939-02-01), Lepick
patent: 3913663 (1975-10-01), Gates
patent: 4313562 (1982-02-01), White

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