Optimum Power Solutions LLC, having its principle place of business in Texas, has filed multiple lawsuits against various companies alleging infringement of US5781784 (the ‘784 patent). The defendants include Hewlett-Packard Company, Lenovo (United States) Inc., Sony Electronics Inc, Panasonic Corporation of North America, Acer, Asus Computer International, Toshiba, Fujitsu and Dell Inc. Acacia Research Corporation, a famous troll, happens to be the parent company of Optimum Power Solutions LLC.
The ‘784 patent, entitled “Dynamic power management of solid state memories” was issued on July 14, 1998 to Zilog, Inc and was assigned to Acacia Patent Acquisition LLC on July 14, 2009. The ’784 patent relates to memory controllers for solid state memories. The ‘784 patent discloses a memory controller having a power management function that allows the power consumption of solid state memories to be controlled or restricted. A total of three independent claims are present in the ‘784 patent of which the first independent claim is provided below:
A dynamic power management device for supplying power to a solid state memory integrated circuit, said device comprising:
power control means for supplying a variable voltage to said memory integrated circuit; and
logic control means for generating address and control signals for said memory integrated circuit and for controlling said power control means;
wherein the power control means supply power to said memory integrated circuit, said power being supplied to the memory integrated circuit at a first variable voltage level during periods of no data access activity and at a second variable voltage level during periods of data access activity, the variable voltage supplied at said first variable voltage level being less than the variable voltage supplied at said second variable voltage level,
wherein the power supplied at the first level is sufficient to preserve information stored in the integrated memory circuit and the power supplied at the second level is sufficient to read and write information in the integrated memory circuit.
Optimum Power Solutions LLC has alleged that the following products of the defendant infringe the ‘784 patent because of which Optimum Power Solutions has suffered losses. Optimum Power claims that the products include components and system for dynamic power management required for supplying variable voltage to solid state devices. The products are:
Hewlett-Packard : HP Pavillion dv3-2150us notebook with an Intel core 2 duo CPU (T6500) 2.1 GHz with a 2MB L2 cache.
Lenovo: Lenovo ThinkPad T500 with an Intel core 2 duo CPU (P8600) 2.4 GHz with a 3MB L2 cache.
Sony: Vaio Z Notebook with an Intel core 2 duo CPU (P8700) 2.53 GHz with a 3MB L2 cache
Panasonic: Toughbook Model CF-F9k