US-based NCR, formerly National Cash Register, has sued software developer MicroStrategy, claiming the US company infringed its database management patents when setting up and running an on-line shop.

According to financial news service Bloomberg, the infringements include operating, using and inducing others to use the MicroStrategy Store.

Both companies had multi-million dollar contracts in place for NCR to resell MicroStrategy software and MicroStrategy to buy NCR’s products. The contracts were cited in a recent lawsuit brought by Microstrategy’s shareholders relating to the auditors’ move to certify 1999 profits and then force the company to report losses instead. The incident also led to charges brought by the Securities and Exchange Commission.

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