One assignee leads the ranking with 4,083 of the 11,053 records in scope, well clear of the field. The top five assignees together hold 7,096 records, 64.2% of all records in scope, and the top ten hold 72.7%. Beyond tenth place the ranking thins into a long tail of assignees with far smaller counts, so a competitive read of this space needs to focus on the concentrated top rather than the full 100-assignee ranking.

Filings peaked in 2018 at 686 and have declined since; from 2021 to 2024, the last year with reasonably complete data, filings fell from 394 to 285, a 28% drop. Figures for 2025 and 2026 look much lower still, but that reflects the roughly 18-month lag between filing and publication rather than a real collapse in R&D activity. Treat any conclusion about the very latest years with caution until more data publishes.

Electrotherapy and radiation therapy classification (A61N) covers 91.2% of the 11,053 records in scope, confirming this is a tightly bounded generator-design corpus. Diagnosis and surgery claims (A61B) appear alongside 19.6% of records, and smaller but notable overlaps exist with power supply systems (H02J, 3.2%) and connector hardware (H01R, 2.1%). Because a single record can carry multiple IPC classes, these shares add up to more than 100% and should be read as overlap patterns, not a strict breakdown.

This Medtronic Urinary Solutions filing describes an implantable pulse generator paired with a subcutaneously implanted lead, an external controller with wireless telemetry, and a charging coil that transcutaneously recharges the generator's battery. The pulse generator also transmits status data back to the controller over the same telemetry link. It is a representative architecture claim covering the combination of rechargeable power, telemetry and external control rather than a narrow component-level claim, which is why it is useful as a reference point for scoping around recharge-and-telemetry designs.

Sub-areas such as current-source output stage calibration, hermetic feedthrough connector design, MRI-conditional shielding, and battery longevity telemetry reporting carry far fewer records than the dominant electrotherapy classification that covers 91.2% of the dataset. These branches sit adjacent to the core generator claims but are not saturated the way recharge and telemetry claims are. A first claim in one of these narrower branches has a better chance of clearing prior art than a claim filed squarely inside the crowded recharge-plus-telemetry combination.