Oh, patents! The wind tree at Piazza Gae Aulenti

Copyright © Françoise Herrmann

Piazza Gae Aulenti in Milan, Italy,  contains a stunning solar tree designed by Ross Lovegrove,  marketed by Artimedi, a picture of which is included below with the Artimedi catalog specifications.  

References

Artimedi North America

https://artemide.net/en/ 

Artimedi Solar Tree - Product Data Sheet

http://www.artemide.com/prodotti/scheda-architectural.action?idSubfamily=665440