Daquan Zhao

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Array ( [id] => 2847154 [patent_doc_number] => 05172128 [patent_country] => US [patent_kind] => NA [patent_issue_date] => 1992-12-15 [patent_title] => 'Antenna with circular polarization, notably for antenna array' [patent_app_type] => 1 [patent_app_number] => 7/606694 [patent_app_country] => US [patent_app_date] => 1990-10-31 [patent_effective_date] => 0000-00-00 [patent_drawing_sheets_cnt] => 1 [patent_figures_cnt] => 3 [patent_no_of_words] => 2924 [patent_no_of_claims] => 5 [patent_no_of_ind_claims] => 1 [patent_words_short_claim] => 257 [patent_maintenance] => 1 [patent_no_of_assignments] => 0 [patent_current_assignee] =>[type] => patent [pdf_file] => patents/05/172/05172128.pdf [firstpage_image] =>[orig_patent_app_number] => 606694 [rel_patent_id] =>[rel_patent_doc_number] =>)

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