In the USA Philips has filed complaints for infringement of Philips patents covering CD-R Disc technology. One complaint has been filed against Princo Corporation of Taiwan and its U.S. based distributor Princo America. A second complaint was filed against Postech Corporation of Taiwan and its U.S. based distributor LEDA distribution.
All CD-R discs manufactured by Postech and Princo infringe upon Philips' essential CD-R disc patents since both companies have not entered into the appropriate patent license agreements with Philips. Consequently, the importation and sale of CD-R discs from Princo and Postech into the United States constitutes infringement of Philips' United States CD-R disc patents.