Jianfeng Song

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Array ( [id] => 20120741 [patent_doc_number] => 20250235772 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-07-24 [patent_title] => TENNIS TRAINING ROBOT AND TRAINING METHOD [patent_app_type] => utility [patent_app_number] => 18/631799 [patent_app_country] => US [patent_app_date] => 2024-04-10 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => -5 [patent_words_short_claim] => 173 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18631799 [rel_patent_id] =>[rel_patent_doc_number] =>)

Array ( [id] => 20287462 [patent_doc_number] => 20250312705 [patent_country] => US [patent_kind] => A1 [patent_issue_date] => 2025-10-09 [patent_title] => Magnetic Assembly Doll Head with Interchangeable Ferromagnetic Facial Features [patent_app_type] => utility [patent_app_number] => 18/628815 [patent_app_country] => US [patent_app_date] => 2024-04-08 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 0 [patent_figures_cnt] => 0 [patent_no_of_words] => 0 [patent_no_of_claims] => 0 [patent_no_of_ind_claims] => 0 [patent_words_short_claim] => 107 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => publication [pdf_file] =>[firstpage_image] =>[orig_patent_app_number] => 18628815 [rel_patent_id] =>[rel_patent_doc_number] =>)

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