PALO ALTO -- Hewlett-Packard, the world's top ranked PC maker, filed suit Tuesday against Acer Inc., alleging infringement on five separate patents and seeking an injunction and unspecified damages

H-P claims Acer, the fourth largest PC maker, infringed on patents for power management, clock switching, and other technologies.



In a statement, H-P called the suit "necessary because HP believes Acer has been selling computer products that use HP's patented technologies without permission."

Last quarter H-P topped the global PC rankings with an 18.1% share. Acer was fourth at 7.1%, behind Dell and Lenovo, according to research firm IDC.