![]() ![]() ![]() 238000006011 modification reaction Methods 0.000 description 1.238000004519 manufacturing process Methods 0.000 description 1.230000001276 controlling effect Effects 0.000 description 3.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 Yawman & Erbe Manufacturing Co filed Critical Yawman & Erbe Manufacturing Co Priority to US67677998A priority Critical patent/US629842A/en Application granted granted Critical Publication of US629842A publication Critical patent/US629842A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links ![]() Original Assignee Yawman & Erbe Manufacturing Co Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US67677998A Inventor Philip H Yawman Current Assignee (The listed assignees may be inaccurate. ![]()
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