"As the innovator of the original Windows Mobile PocketPC Phone Edition in 2002 and the first Android smartphone in 2008, HTC believes the industry should be driven by healthy competition and innovation that offer consumers the best, most accessible mobile experiences possible," said Jason Mackenzie, vice president of North America, HTC Corporation, in a prepared statement. "We are taking this action against Apple to protect our intellectual property, our industry partners, and most importantly our customers that use HTC phones."

U.S. Patent No. 6,999,800: "Method for Power Management of a Smart Phone," issued on Feb. 14, 2006, and relating to a method for "independently managing the power in a smartphone containing both phone and PDA subsystems."

U.S. Patent No. 5,541,988: "Telephone Dialler [sic] with a Personalized Page Organization of Telephone Directory Memory," issued on July 30, 1996, and relating to a "telephone dialer than can store and access information in a telephone directory"

U.S. Patent No. 6,058,183: "Telephone Dialler [sic] with a Personalized Page Organization of Telephone Directory Memory," issued on May 2, 2000, also generally related to "a telephone dialer than can store and access information in a telephone directory"

U.S. Patent No. 6,320,957,"Telephone Dialler [sic] with Easy Access Memory," issued on November 20, 2001, and also generally related to a "a telephone dialer than can store and access information in a telephone directory

U.S. Patent No. 7,716,505, "Power Control Methods for a Portable Electronic Device," issued on May 11, 2010, and related to "a power control method for a smart phone."