I found data under

https://ourworldindata.org/grapher/patents-filed-for-renewables

But I think, that almost no relation to energy production (or similar data) can be found. important innovations (like solar cells around 1940) were already invented and patented many years ago and got importance during the past decennium.

Some patent indicators that can be analyzed in the context of time series are:

- Patent applications and grants

- Patent families

- Patent citations

- Patent classifications

Chuck A Arize Thank you for your valuable guidance.