A row has erupted centring around Hewlett-Packard (HP), which claims two Taiwan-based companies and a Chinese firm are infringing on its patents.
The US computer giant for inkjet print cartridges maintains that Asia Pacific Microsystems (APM), a subsidiary of Taiwan-based United Microelectronics Corp, was infringing on its patents in manufacturing inkjet printheads.
HP said the US International Trade Commission (USITC) had upheld an initial ruling in its favour in June.
In addition, the USITC ruled that MicroJet Technology Co, a subsidiary of Taiwan-based DB-Tel Inc, and China-based PTC Holdings Ltd are infringing on HP patents in the manufacturing and sale of inkjet print cartridges, HP said.
The USITC has the power to bar importation and sale of products found to be infringing on patents.
The Washington-based quasi-judicial federal agency recommended that the items be barred from the United States, HP said in a statement.
Vyomesh Joshi, executive vice-president of HP's imaging and printing group, said: "HP makes a tremendous investment in developing innovative products for our customers and is committed to pursuing action to protect these innovations and, by extension, the value we deliver to our customers."
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