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[patent_title] => 'Hydraulic platform lift incorporating positive displacement valve, and positive displacement valve for hydraulic platform lift'
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[patent_issue_date] => 2011-01-25
[patent_title] => 'Elevator system having drive motor located between elevator car and hoistway sidewall'
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[rel_patent_id] =>[rel_patent_doc_number] =>) 09/163259 | Elevator system having drive motor located between elevator car and hoistway sidewall | Sep 28, 1998 | Issued |