From the small amount of information I can find, they "formed via partnership with Kel-lite" (from Nordic's website). However, I also know that Brinkman bought the rights to Kel-lite designs when Kel-lite went out of business. The Brinkman Legend lights were designed as a result of this.
Anyhow, since Nordic's address is on Long Island, I would also suspect that the lights are imported. This would be pure speculation. Their site offers contact information, so you may want to try sending them an email with your questions.