American technology companies have resumed selling certain products to Huawei Technologies Co. after concluding there are legal ways to work with the Chinese telecom giant in spite of its inclusion on a Trump Administration blacklist.

Micron Technology Inc., the largest U.S. maker of computer memory chips, said on Tuesday that it had started shipping some components to Huawei after its lawyers studied export restrictions. Intel Corp., the largest microprocessor-maker, has also begun selling to Huawei again, according to a person familiar with the matter. It's not clear how many other suppliers have reached the same conclusion.

The U.S. Commerce Department added Huawei last month to what's known as an entity list, a move designed to bar the Chinese company from buying American components and software. The Trump Administration said Huawei helps Beijing in espionage and represents a security threat — charges the company denies. Officials at the Commerce Department and the White House are frustrated that companies have resumed Huawei shipments, according to another person familiar with the matter. The White House didn't immediately respond to a request for comment.