Seiko Epson has won assurances from a number of manufacturers and importers of ink cartridges that the companies will end their business with Epson-compatible cartridges.

In February this year, Epson filed a complaint with the US International Trade Commission against 24 companies that manufacture, import, or distribute after-market ink cartridges for sale in the US. The complaint sought to ban the companies from importing or selling the cartridges in the US. At the same time Epson filed a lawsuit in the US District Court in Portland against the same companies seeking damages for the alleged intellectual property infringement.

Of the 24 companies, five have agreed to settle with Epson at both the ITC and district court. A further three companies have agreed with the ITC to stop importing cartridges, but will have their cases heard at the district court. Another eight companies have had default judgements filed against them at the ITC because they failed to respond to the complaint with the time allowed, Epson said.

Trials against the remaining companies at the ITC will begin in January.

The settlements and judgments are the latest in a line of legal victories by Epson against third-party ink-cartridge makers, distributors and vendors.

In June this year a court in Taiwan barred a local manufacturer of continuous ink supply systems from producing models for Seiko Epson printers after receiving a petition from the Japanese company. A month Epson earlier succeeded in getting four German online retailers of printer ink cartridges to stop selling a number of third-party ink cartridges designed for use in Epson printers.

Printer makers like Epson typically rely on a business model that sees them selling printers at little or no profit, then making money down the line on ink cartridges and other consumable items. Epson sells its own replacement cartridges and a number of companies make and sell Epson-compatible products.