Soundproof wall unit

- Sanken Steel Co., Ltd.

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Description

FIG. 1 is a front view of a soundproof wall unit showing the design;

FIG. 2 is a rear view of a soundproof wall unit showing the design;

FIG. 3 is a top plan view of a soundproof wall unit showing the design;

FIG. 4 is a right side view of a soundproof wall unit showing the design;

FIG. 5 is a cross sectional view along the line 5--5 in FIG. 1 of the soundproof wall unit showing the design; and,

FIG. 6 is a perspective view from above and front side of the soundproof wall unit showing the design.

Referenced Cited
U.S. Patent Documents
D233832 December 1974 Becker
Other references
  • Forms and Surfaces catalog, ceiling section, p. 13, center of page, left side of illustration, first full tile illustration. Also note lower right side of p. 13, illustration labeled "perforated circles", copyright 1986.
Patent History
Patent number: D410291
Type: Grant
Filed: Jul 7, 1997
Date of Patent: May 25, 1999
Assignee: Sanken Steel Co., Ltd. (Tokyo)
Inventor: Shinzo Ito (Tokyo)
Primary Examiner: Doris Clark
Law Firm: Armstrong, Westerman, Hattori, McLeland & Naughton
Application Number: 0/73,339
Classifications
Current U.S. Class: Rectangular Or Square (D25/156)
International Classification: 2501;