Energy conservation device

Details Energy conservation device Energy conservation device

2008-07-29

2008-07-29

Clark, Doris (Department: 2914)

Building units and construction elements

Architectural stock material

Elongated

Design Patent

active

29286293

CLAIM:
The ornamental design for an energy conservation device, as shown and described.

REFERENCES:
patent: 4449267 (1984-05-01), Siemion
patent: 4660323 (1987-04-01), Kanies
patent: D417295 (1999-11-01), Trieste
patent: D446870 (2001-08-01), Gardner
patent: D498309 (2004-11-01), Koerner et al.

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