SUNNYVALE, Calif. -- SanDisk Corp. announced today that it has filed a suit against four companies over alleged patent infringement concerning its flash-memory technology.
The suit, filed in the United States District Court for the Northern District of California, cited the following companies for patent infringement: Memorex Products Inc., Santa Fe Springs, Calif., Pretec Electronics Corp., Fremont, Calif., Ritek Corp., Hsinchu, Taiwan; and Power Quotient International Co., Ltd, Fremont, Calif.
The companies are alleged to have infringed upon SanDisk's U.S. Patent No. 5,602,987. The patent discloses important aspects of the operation of removable flash memory cards.
"We believe that Memorex, Pretec, Ritek and PQI have beenselling and offering for sale flash memory cards that infringe valid SanDisk patents," said Steven S. Baik, senior intellectual property counsel for SanDisk. "This action is a clear signal to these and other Taiwanese companies that SanDisk will vigorously assert its intellectual property rights against such companies."