Array
(
[id] => 2714325
[patent_doc_number] => 04992893
[patent_country] => US
[patent_kind] => NA
[patent_issue_date] => 1991-02-12
[patent_title] => 'Alignment disk for magnetic disk driving apparatus and method and apparatus for verifying tracking error of the magnetic disk driving apparatus'
[patent_app_type] => 1
[patent_app_number] => 7/014786
[patent_app_country] => US
[patent_app_date] => 1987-02-13
[patent_effective_date] => 0000-00-00
[patent_drawing_sheets_cnt] => 11
[patent_figures_cnt] => 19
[patent_no_of_words] => 6944
[patent_no_of_claims] => 30
[patent_no_of_ind_claims] => 7
[patent_words_short_claim] => 65
[patent_maintenance] => 1
[patent_no_of_assignments] => 0
[patent_current_assignee] =>[type] => patent
[pdf_file] => patents/04/992/04992893.pdf
[firstpage_image] =>[orig_patent_app_number] => 014786
[rel_patent_id] =>[rel_patent_doc_number] =>) 07/014786 | Alignment disk for magnetic disk driving apparatus and method and apparatus for verifying tracking error of the magnetic disk driving apparatus | Feb 12, 1987 | Issued |