E. Digital Files Patent Suits Against Tech Companies, Retailers

E.Digital Corp. (EDIG), a San Diego-based supplier of video-on- demand support technology, filed five new patent-infringement lawsuits in federal court in San Diego.

These filings bring to 21 the total number of recent patent cases the company has filed. The suits related to technology used in smartphones and tablets, such as file-management functionality, flash-memory integrity testing and noise suppression.

Defendants include Apple Inc. (AAPL), Huawei Technologies Co. and ZTE (USA) Inc. The company also sued retailers and distributors, including Wal-Mart Stores Inc. (WMT), Target Corp., and Verizon Communications Inc., E.Digital said in a statement.

http://www.bloomberg.com/news/2013-04-03/astrazeneca-e-digital-papples-intellectual-property.html