Jianchun Qin

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Array ( [id] => 17431350 [patent_doc_number] => 20220059059 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2022-02-24 [patent_title] => Interchangeable Bridge Block System for a Guitar [patent_app_type] => utility [patent_app_number] => 17/503622 [patent_app_country] => US [patent_app_date] => 2021-10-18 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 11255 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -17 [patent_words_short_claim] => 102 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 17503622 [rel_patent_id] =>[rel_patent_doc_number] =>)

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