#Sluice box riffle angle pdf#

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Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Swedman Perry filed Critical Swedman Perry Priority to US150972A priority Critical patent/US2183157A/en Application granted granted Critical Publication of US2183157A publication Critical patent/US2183157A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US150972A Inventor Swedman Perry Original Assignee Swedman Perry Priority date (The priority date is an assumption and is not a legal conclusion.

#Sluice box riffle angle pdf#

Google Patents US2183157A - Sluice box riffleĭownload PDF Info Publication number US2183157A US2183157A US150972A US15097237A US2183157A US 2183157 A US2183157 A US 2183157A US 150972 A US150972 A US 150972A US 15097237 A US15097237 A US 15097237A US 2183157 A US2183157 A US 2183157A Authority US United States Prior art keywords bars rifle cap members cap rubber Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.