The inventory site can import items from a CSV file. Attached is a template (log in to view the attachment) that you can use to add your inventory items to and we can use the file to import the entries to the site. Email your file to inventory@ithelp.uoregon.edu.
The templates has 3 sheets, one for entries, one describing the fields and one that shows allowed values for fields that require those. Fields marked with red are required. Fields marked with ** are required to have unique values.