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Keywords: Drawing of lock washer from US Pat 1655018.jpg Lockwasher involved in lawsuit described in article National Lockwasher Co v George K Garrett Co US Pat 1655018 1928 US Gov erbnebt PD-USGov Original upload log en wikipedia Drawing+of+lock+washer+from+US+Pat+1655018 jpg wikitable - 2016-04-08 01 01 622×332× 27541 bytes PraeceptorIP Uploading a public-domain item using File Upload Wizard Uncategorized 2016 May 5 |