How AI Claim Charting Showed 4 of 5 Wi-Fi 6 Patents Were Not Essential

Value Delivered

The client entered the royalty conversation knowing which asserted patents genuinely read on Wi-Fi 6 and which did not, with the evidence to show it.

Five patents, each with one independent claim, were charted against IEEE Std 802.11ax-2021 in a single session. The outcome:

• One patent was confirmed essential.
• Four patents were shown not to be essential, each with a claim chart on record.

The findings enabled the client to:

• Shrink the royalty base: Argue that a FRAND rate be calculated on one essential patent instead of five.
• Replace assertion with evidence: Each non-essential finding carries the clause text and the reason the limitation is not met, so it stands up to review by the other side.
• Act before terms were set: Establish the position while the negotiation was still running, not after the numbers were agreed.
• Spend expert time where it counts: Focus specialist review on the one patent that held up.

Problem Solved

Five patents had been put forward as essential to IEEE 802.11ax. The client needed to know which of them actually read on the standard, and needed the answer in days, not months.

Charting five patents manually against a full amendment would have taken weeks of specialist time, while the negotiation was already running. Meanwhile, every patent accepted as essential without evidence widens the royalty base and weakens the client’s position.

A FRAND rate is only as sound as the essential set it is calculated on. Establishing which patents are not essential is as commercially valuable as confirming which are, yet it is far less often checked.

Solution Offered

GreyB’s AI SEP Tool broke each claim into its individual limitations and tested every one against the full text of IEEE 802.11ax. For each limitation, the chart showed the relevant standard text, an explanation, and a disclosure rating of Explicit, Implicit, or Missing.

The claim that decided the case covered handling of Request-to-Send / Clear-to-Send (RTS/CTS) transmissions, with a station’s NAV behavior depending on whether the frame came from a station or an access point. The standard has an inter-BSS NAV mechanism, so the claim looked relevant at first glance. But both operative limitations came back missing:

• Not setting the NAV when the RTS came from the second station, or the CTS from the second access point; and
• Setting the NAV when the RTS came from the second access point, or the CTS from the second station.

No clause the tool reviewed (including sections 26.2.4, 26.10.2 and 10.3.2.4) requires that behavior. A compliant Wi-Fi 6 device can be built without ever performing it, which makes the claim non-essential.

The client ultimately received:

• One claim chart per patent, produced in a single session;
• One patent confirmed essential and four with clause-level evidence of non-essentiality;
• Clause text and reasoning that the other side’s reviewers can check directly; and
• A royalty position re-based on evidence instead of assertion.

The result showed that where patents are put forward as essential on assertion alone, claim-level charting separates what the standard requires from what it merely resembles.

Get the full case study to discover how clause-level screening ruled out four of five asserted Wi-Fi 6 patents before the royalty conversation began.