Unified is seeking prior art on at least claim 38 of US-9900067-B2, owned by ETRI and asserted by Sol IP, LLC, an NPE. The '067 patent covers wireless data transmission in a MIMO/WLAN system using variable channel bandwidths. Its core idea is to make control/signal fields more efficient and reliable by repeating or structuring them differently depending on the frequency band used. It had been asserted against AT&T, Sprint, Verizon, Qualcomm, Volkswagen, and others. For more information on the patent: https://portal.unifiedpatents.com/patents/patent/US-9900067-B2 View the Similar Documents (patents + scholarly publications) generated by Google Patents: Patents: https://patents.google.com/?q=(~patent%2fUS9900067B2)&before=filing:20100312 NPL: https://patents.google.com/?q=(~patent%2fUS9900067B2)&before=filing:20100312&patents=false&scholar PATROLL researchers are required to use Pearl to generate claim charts. Submitted invalidity charts must address every limitation of the challenged claim. This may require using more than one prior art reference. Each PATROLL researcher can generate up to 30 invalidity claim charts per month using Pearl. These charts can be downloaded then submitted to PATROLL. Click on Pearl AI-Assisted Claim Chart below to get started with Pearl