By Michael Borella — Mentone sued Digi for alleged infringement of Mentone’s U.S. Patent No. 6,952,413. The U.S. District Court for the District of Delaware found the claims of the patent to be ineligible under 35 U.S.C. § 101. Mentone appealed. The invention of the ‘413 patent is directed to improvements in the allocation of wireless resources for wireless packet data channels (PDCHs).[1] In the relevant technology, the wireless air interface resources are shared using a technique called time-division multiplexing. Each PDCH is represented by a repeating set of paired time slots in the uplink and downlink directions. The uplinks…
