Tesla gives up patents to open source

Electric carmaker Tesla announced on Friday that it was giving up its patents to "the open source movement" to help spur electric vehicle technology.

The unusual move comes with Tesla enjoying huge success, but against a backdrop of multiplying legal squabbles among technology firms over patents.

"All our patents belong to you," Tesla chief executive Elon Musk said in a blog post.

"Yesterday, there was a wall of Tesla patents in the lobby of our Palo Alto headquarters. That is no longer the case. They have been removed, in the spirit of the open source movement, for the advancement of electric vehicle technology."

Musk, an entrepreneur who made a fortune with the PayPal online payment service and also heads the space travel firm Space X, said he does not want patents to halt growth of an important environmental technology. 

"We believe that Tesla, other companies making electric cars, and the world would all benefit from a common, rapidly-evolving technology platform," he wrote.