Air ventilation grill

Details Air ventilation grill Air ventilation grill

2001-11-29

2004-10-05

Zarfas, Louis S. (Department: 2914)

Environmental heating and cooling; fluid handling and sanitary e

Heating or cooling

Element or attachment, not elsewhere specified

Design Patent

active

D0496992

CLAIM:
The ornamental design for a air ventilation grill, as shown.

REFERENCES:
patent: 2021086 (1935-11-01), Oskamp
patent: 2240617 (1941-05-01), Harrigan
patent: D166324 (1952-04-01), Kurth
patent: D171505 (1954-02-01), Krueger
patent: 2811094 (1957-10-01), Auer
patent: 4991496 (1991-02-01), Kuno et al.

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