*Instead of taking two arguments, as the USPTO Patent Parser does to download the patent data, it takes text file in the same directory as USPTO_Assignee_Download.pl. The text file should contain one line, the url leading to the page on the USPTO bulk website where all the zip files are located for the USPTO Assignee data. The current url is https://bulkdata.uspto.gov/data2/patent/assignment/. An example of a text file that can be passed to USPTO_Assignee_Download.pl is Base_URLs, which is located under McNair/usptoAssigneeData.
*The perl script downloads all the zip files present on the page. It is not possible currently to specify which year to start the download at. Therefore, before the data has been split, you will have to check what the last reel number and frame number that were loaded into the database are.