For each technology field, for each nation, PatentPia GodenCompass provides an analysis of the companies that specialize in that field. A specialized company is a company that is focused on that technology field, i.e., most of the patents in possession are patents related to field.
The example below is a GoldenCompass page for specialized companies focused on augmented reality (AR), an example of a technology field.
[Link]
GoldenCompass provides information about specialized companies in a given technology field(shown at the top left of the page) under the 1 depth menu → Specialized companies 2 depth. Under the 3 depth menu, you can compare metrics for each company. In the index comparison, you can see that all companies on the page have a concentration rate of 100%. A concentration rate of 100% means that 100% of the patents in possession of these companies are patents related to field.
If you click on the 3 or 4 depth menu on the left(e.g. trends in portfolios, etc.), you will see the following time series analysis.
[Link]