File:Digger tooth.JPG

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US patent No. 4,980,980

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	03:24, 10 October 2006		840 × 645 (38 KB)	Randolphr (talk \| contribs)	(Public domain goverment document, US patent No. 4,980,980)

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