When you "invent" a new machine a whole new field of potential applications is opened up for those who can see the benefits of the design.
This video and the working model were done before the patent was issued.
Patent US7677208 - Radial rotary engine with energy storage - Google Patents
The patent focuses on a hydraulic hybrid application, but it could be used for many other applications.
Wind turbines
Pumped energy storage
Positive displacement superchargers, electric and mechanical.
I once told someone there were potentially thousands of applications and I have no reason to change that belief.
regards
Mech