Heat recovery unit

Environmental heating and cooling; fluid handling and sanitary e – Heating or cooling – Domestic water heater or boiler

Design Patent

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Design Patent

active

D0510761

CLAIM:
The ornamental design for a heat recovery unit, as shown and described.

REFERENCES:
patent: 4377201 (1983-03-01), Kruse et al.
patent: D286565 (1986-11-01), Drucker et al.
patent: 5002118 (1991-03-01), Olmstead et al.
patent: D376842 (1996-12-01), Franklin et al.
patent: D448460 (2001-09-01), Hamasaki et al.
patent: D476073 (2003-06-01), Bourgeois
patent: D486898 (2004-02-01), Kendall

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