Ventilation grids

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Description

FIG. 1 is a perspective view of a first embodiment of a ventilation grid in accordance with the present invention;

FIG. 2 is a bottom view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a perspective view of a second embodiment of a ventilation grid in accordance with the present invention;

FIG. 6 is a bottom view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a side view thereof;

FIG. 9 is a perspective view of a third embodiment of a ventilation grid in accordance with the present invention;

FIG. 10 is a top view thereof;

FIG. 11 is a bottom view thereof; and,

FIG. 12 is a side view thereof.

Claims

The ornamental design for ventilation grids, as shown.

Referenced Cited
U.S. Patent Documents
2021086 November 1935 Oskamp
D113047 January 1939 O'Day
D118851 February 1940 Demuth
D300174 March 7, 1989 Waltz et al.
D309348 July 17, 1990 Sarazen et al.
D341443 November 16, 1993 Shapiro
D370723 June 11, 1996 Nishizawa
D438328 February 27, 2001 Pan
Patent History
Patent number: D538422
Type: Grant
Filed: Aug 5, 2004
Date of Patent: Mar 13, 2007
Assignee: RDW Beheer B.V. (Oosterhout)
Inventor: Antonius Johannes Cornelis Hooijmaaijers (Oosterhout)
Primary Examiner: Catherine R. Oliver
Attorney: The Webb Law Firm
Application Number: 29/210,786
Classifications
Current U.S. Class: Flow Director (29) (D23/387)