Can't find any actual confirmation.
His release of patents has revolutionized the ev car industry
One would think that Tesla would want others to know exactly how their patents have "revolutionized the ev car industry".
There is this though:
Musk didnt confirm which companies are currently using Teslas patents, but it would be interesting to know if they are established automakers or startups and to see if not only new electric vehicles utilizing Teslas patents will come out in the future, but also if Tesla will be able to access new patented technologies for future implementations through the Patent Pledge agreement
https://electrek.co/2015/11/10/a-number-of-companies-are-now-using-teslas-open-source-patents-and-it-has-some-interesting-implications/
"We have had
a number of inquiries from other car companies and we've told them to go ahead and use them," Musk says.
http://www.usatoday.com/story/money/cars/2014/10/14/tesla-musk-patents/17247723/
Honda, GM, Dismiss Tesla Electric Car Patent Giveaway. Are Others Following Suit?
https://transportevolved.com/2014/06/30/honda-gm-dismiss-tesla-electric-car-patent-giveaway-others-following-suit/
Perhaps Musk has tweeted about the patents and I missed it
As for his promises- many people still think there are going to be battery swap stations everywhere, with a 90 second swap of a 1,300 pound liquid cooled battery which always was absurd.
The Tesla battery swap is the hoax of the year
What California says about zero-emission vehicles, and why Tesla is committing fraud
https://wattsupwiththat.com/2013/12/21/the-tesla-battery-swap-is-the-hoax-of-the-year/