Although the US Department of Commerce has not fully enforced its ‘entity list’ rules, imposed last April against Huawei, it is already considering more stringent measures to limit the Chinese firm’s ability to buy chips from US companies. The entity list forces any US company to apply for a special licence in order to sell to Huawei, though vendors complaint of being caught in limbo – there have been postponements of the deadline to enforce the rules, but those applying for licences say none has been awarded yet. Now the DoC, according to the Wall Street Journal, wants to add to the isolation of Huawei from US technology by expanding the existing ‘foreign direct product rule’. That restricts any foreign…