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The Biohazard Symbol with dimensions All parts of the biohazard sign can be drawn with a compass and straightedge . The basic outline of the symbol is a plain trefoil , which is three circles overlapping each other equally like in a triple Venn diagram with the overlapping parts erased.
The biohazard symbol was developed in 1966 by Charles Baldwin, an environmental-health engineer working for the Dow Chemical Company on their containment products. [1] It is used in the labeling of biological materials that carry a significant health risk, including viral samples and used hypodermic needles .
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Description: The symbol for biohazard substances (without the black-yellow triangle.) Source: old version of Image:Biohazard symbol.svg; Author: Silsor; Other versions: Date: 29 April 2006 (original upload date) Source: No machine-readable source provided. Own work assumed (based on copyright claims). Author: No machine-readable author provided.
Date/Time Thumbnail Dimensions User Comment; current: 01:58, 31 December 2021: 512 × 512 (866 bytes): Vizorsols: reverted needlessy rounded value: 03:16, 27 December 2021
modified symbol to remove overlap on inner arc: 16:21, 10 August 2021: 512 × 446 (1 KB) Vizorsols: adjust triangle, ISO 3864-4 coloring (RAL 1003) 01:07, 4 August 2021: 512 × 447 (1 KB) Vizorsols: removed pixel of whitespace at bottom: 01:06, 28 July 2021: 512 × 448 (1 KB) Vizorsols: Perfect symbol. There is likely room for optimization: 00: ...
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The symbol for biohazard substances (without the black-yellow triangle.) Date: 20 May 2008: Source: Modified from Image:Biohazard symbol.svg: Author: Original by Silsor; Colour change by Lokal_Profil; Permission (Reusing this file) Same as original