![]() 238000006011 modification reaction Methods 0.000 description 2.238000006073 displacement reaction Methods 0.000 description 4.230000036558 skin tension Effects 0.000 claims abstract description 14.230000001276 controlling effect Effects 0.000 claims abstract description 18.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from GB0714950.3 external-priority Application filed by Peter Christmas filed Critical Peter Christmas Publication of US20110154973A1 publication Critical patent/US20110154973A1/en Application granted granted Critical Publication of US8253002B2 publication Critical patent/US8253002B2/en Status Active legal-status Critical Current Adjusted expiration legal-status Critical Links ( en Inventor Peter Christmas Original Assignee Peter Christmas 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 as to the accuracy of the status listed.) Active, expires Application number US12/671,695 Other versions US20110154973A1 Google Patents US8253002B2 - Drum tuning deviceÄownload PDF Info Publication number US8253002B2 US8253002B2 US12/671,695 US67169508A US8253002B2 US 8253002 B2 US8253002 B2 US 8253002B2 US 67169508 A US67169508 A US 67169508A US 8253002 B2 US8253002 B2 US 8253002B2 Authority US United States Prior art keywords drum drive head tuning device drum tuning control means Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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