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Primary key: patent_number, first_name, last_name (in case it is possible for there to be multiple assignees for an individual patent)
All columns (variables): First * patent_number (varchar(255)) unique identifier for the patent from the UPSTO office, can contain letters hence varchar *first_name (varchar(255)) first name, of assignee*last name (varchar(255)) last name, of assignee* address (varchar(255)) address, of assignee* postcode (varchar(255)) postcode, of assignee orgname, city, country, patentnumber, state, residence, size of firm
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