Intergraph has filed a lawsuit charging Dell Computer, HP and Gateway with patent infringement, the company announced earlier this week.
Intergraph told the US District Court in the Eastern District of Texas that the three computer vendors infringe on at least three patents related to its Clipper cache memory management technology, it said in a statement.
Intergraph won a suit against Intel in October when a judge ruled that its Itanium chip infringed Intergraph's Clipper patents. The ruling was expected to cost Intel US$150 million in damages. An earlier patent infringement case in April saw Intel paying Intergraph $300 million and licensing Intergraph technology.
The settlement agreement with Intel did not include licences for Intel's customers, however, and specifically set out Intergraph's intention to seek payment for patent licences from manufacturers, Intergraph said.
The Intergraph technologies relating to the lawsuits announced this week are covered by US Patent Numbers 4,899,275; 4,933,835 and 5,091,846, the company said. They can be viewed through the US Patent and Trademark Office Web site, at www.uspto.gov/.