Sae Professional Audio is a Chinese company formed in 1996 while SAE states it links like back 5 decades. Likely, the SAE company acquired the trademarks from the original company or even bought the SAE corporation, assuming it was shelled and was a self company. A number of companies will by the corporation after it has gone through bankruptcy and nothing is left except the trademarks and maybe tax credits. Considering the current state of many Chinese companies' use of trademarks, it is unlikely any would seek an injunction. Most of these companies never trademark in the US and in this case if attempted, it likely would have been challenged by the trademark office or SAE trademark owner.
It would be interesting and great if SAE produces as high a quality product as it once did. The name still has street cred, so to speak as they never compromised quality, something many others did as they spiraled downwards.