Roughness indicator

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Description

FIG. 1 is top and left front perspective view of a roughness indicator showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D264190 May 4, 1982 Muller
D264444 May 18, 1982 Muchenberger
2733598 February 1956 Miner
3029522 April 1962 Stolle
4776212 October 11, 1988 Parsons
Patent History
Patent number: D301016
Type: Grant
Filed: May 28, 1986
Date of Patent: May 9, 1989
Assignee: Bruel & Kjaer A/S (Naerum)
Inventor: Svend E. Fauerskov (Holte)
Primary Examiner: Nelson C. Holtje
Law Firm: Cushman, Darby & Cushman
Application Number: 6/867,689