Which rate period are historical unmatched royalties from?

The historical unmatched royalties transferred to us cover a span of fourteen years (between 2007 and 2020), and there are three different sets of rates that apply to these uses. The chart below shows the years covered by each of those rate periods, along with the amount of historical unmatched royalties transferred to The MLC for uses that took place during those rate periods:

For more information about historical unmatched royalties, read more here.