Q1. What is 'Delta'?
The overall change over time. In the example above, the overall change in number of filings for lithium-sulfur batteries between 2010-2015 was an increase of 3. Calculating delta helps to identify dramatic increases / decreases, rather than counting by totals. 

For example, if filing counts were:

Years 2010/11 = 145
Years 2012/13 = 150
Years 2014/2015 = 155 

TOTAL filings = 450 

Delta = 10

The total of 450 filings in a technology is significant, but it doesn't tell us if there has been an increased focus in this area compared to others. 

In another example:

Years 2010/11 = 14
Years 2012/13 = 50
Years 2014/2015 = 110

TOTAL filings = 174

Delta = 96

While the total number of filings overall is lower in Example 2, the Delta is significantly higher. This helps to draw our attention to the fact that filings in this space are increasing more rapidly than filings in Example 1.

Q2. Can I specify the time period calculated in the output?

A2: Not currently, but we could add this as a new feature if it would be helpful. The growth metric above is helpful because it evens out the data i.e. if there was a big spike in activity one year, you’d still see the growth for the last six years overall (it would not be skewed by the spike). 

Q3: What data is being analysed? 

A3: All patents filed by the organisation(s) across all technologies in your report.

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