IBM Seeks Cancellation Of Session Initiation Protocol-Related Patent

(May 6, 2022, 1:10 PM EDT) -- ALEXANDRIA, Va. — In a May 4 petition for inter partes review (IPR) filed with the Patent Trial and Appeal Board, International Business Machine Corp. (IBM) asserts that a patent which purportedly solves the need to support multiple simultaneous application sessions to a single subscriber by providing a session initiation protocol (SIP) network would have been obvious to a person of ordinary skill....

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