The assignee ranking covers 46 companies, and the leader holds 28 of the 110 records in scope. The top five combined account for 69.1% of all 110 records, so protection in this field is heavily concentrated rather than spread evenly across many filers. Below the top ten, which together hold 82.7% of records, the ranking thins into a long tail of single- or few-filing entrants, meaning most freedom-to-operate risk comes from a small number of large portfolios rather than from many small ones.

A61B diagnosis-and-surgery classes cover 68.2% of the 110 records, and G16H healthcare informatics covers 49.1%, well ahead of H04W wireless-network claims at 15.5%. That gap indicates most patent activity is directed at what the sensor measures and how the data is processed and displayed, not at the wireless transport mechanism itself. A filer looking for open ground should look past the radio link toward sensing, calibration or informatics claims, where density is highest but also where design-around opportunities need to be found more carefully.

Records tagged to H04W, the wireless communication networks class, make up only 15.5% of the 110 records in scope, far below A61B's 68.2% and G16H's 49.1%. This suggests the transceiver and radio-protocol layer has been treated more as a commodity component than as a primary claim target, while the sensor and data-management layers carry the bulk of filed protection. Anyone designing a new CGM telemetry link should still search this class carefully, but the denser prior art sits elsewhere.

CA2962650A1, filed by Dexcom in 2016, is the most useful representative record because it directly claims a continuous glucose monitor that limits and authenticates connections to multiple display devices using hashing and a rotating application key. It illustrates the multi-display security pattern that recurs across the corpus and is a practical starting point for a freedom-to-operate check. The most-cited record overall, EP0880936A2 on telemetric patient monitoring with 929 citations, is the older foundational document worth reading second.

Not very, on its own. Publication typically lags actual filing by roughly 18 months, so the most recent year in any patent trend — 2026 here — always understates real activity, and a growth rate has not been stated because fewer than four complete years remain once that lag is accounted for. The peak year recorded so far is 2020 at 12 filings; readers should treat the years after that as provisional rather than as evidence of a slowdown.