A Tokyo-based computer software company plans to file a patent infringement suit against major mapmaking firms over technologies used to make electronic maps for car navigation systems, a company spokesman said Monday.

The company, Maruishi Digital, has argued that the Association of the Precise Survey & Applied Technology, which has 116 mapping-related companies as members, and the Geographical Survey Institute, the governmental body in charge of mapping, have infringed on its electronic mapping technologies over the years.

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