[jsmith45]

The specification is posted publicly, with no listed restrictions, so the only method Tesla has of licensing this is via enforcing their patents.

While I expect car manufacturers would want to negotiate a custom patent license, others interesting in using the patents (like say EVSE manufacturers) could technically just utilize the Tesla patent pledge.

Of course if they do so they cannot later sue Tesla for any form of IP infringement, without getting countersued over the patents. Thus if you use tesla's patents under the license, you can sue them for copyright, patent, trademark, trade-secret or any other right, without getting countersued. This would mean Tesla could openly make full blown counterfeits of your companies products, and you cannot sue them without getting countersued for patent violation. So I'm doubting terribly many will want to take up this offer, but they technically could.

[advisedwang]

The risk that Tesla sues over patent infringement stands alone of any tit-for-tat infringement. Realistically, it's much more likely Tesla will just sue for $ rather than try and make a counterfeit of an infringer's product. No sane counsel would let their company knowingly and openly infringe on major patents like this.

The spec being open put up on a website does practically nothing. Patent's are public and it'd be trivial to reverse engineer a charging standard anyway.