IP questions surface in GM Hummer auction as well

Once again, patents and intellectual property concerns appear to be getting in the way of a planned General Motors Co. divestiture.

The automaker's planned sale of its gas-guzzling Hummer unit to Sichuan Tengzhong Heavy Industrial Machinery Co. has reportedly been delayed by China's Ministry of Commerce, with the ministry seeking details about whether Tengzhong is buying Hummer's...