According to DigiTimes, Ricoh has filed lawsuits against Quanta Storage and Asustek, claiming that the two companies have infringed on four of its disc patents.
Japan-based Ricoh on August 24 filed legal proceedings at a US District Court in Wisconsin against Quanta Storage and Asustek Computer, two leading makers of optical disc drives (ODDs) in Taiwan, for infringing on four of its patents related to CD-RW and DVD+RW formats, according to industry sources in Taiwan.

In response, both Quanta Storage and Asustek indicated they have not received notification about the lawsuit and therefore could not make an assessment. Quanta Storage is the largest slim-type ODD maker in Taiwan, while Asustek is a large producer of PCs.
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