The number is in the filing or it isn't, and on March 17, 2026, the filing said 15: that is how many US patents the United States issued to DENSO Corporation in a single grant window. DENSO is not an automaker; it is one of the largest tier-1 suppliers, selling components into many vehicle programs at once. So a grant block from DENSO reads differently from an automaker's — the question is not what one car maker locked in, but across how many of a supplier's content lines the coverage spreads. This block spreads widely. The classification facets show the day's patents scattered across the H01L semiconductor families, the H02K and H02M motor and power-conversion families, the H01M battery family, the B60W driver-assistance family and the H04W wireless family, with no subclass collecting more than two grants.

The largest concentration, such as it is, sits in power electronics — the silicon that converts and switches the current in an electrified vehicle. US12581946B2 claims a semiconductor device and power converter with a specific terminal-and-groove wiring arrangement, classified in H01L and H02M. US12581969B2 covers a semiconductor device with a conductor-circuit pattern on an insulating layer over a conductor plate, and US12581951B2 claims a semiconductor module with multiple heat-sink plates and a sealed fluid for cooling. Alongside them, US12581716B2 covers a semiconductor device with a metal film forming a Schottky junction on the substrate — a power-device claim relevant to the wide-bandgap parts that go into inverters. For a supplier whose power-electronics content rides on every electrified vehicle it supplies, issued coverage clustered here is coverage on a component sold many times over.

From the motor to the battery to the network

The propulsion and energy content extends past the silicon. US12580434B2 claims a rotor for a rotating electric machine in which each permanent magnet is fixed in its receiving hole by a fixing resin, with the radially outer resin given a higher adhesive strength than the inner resin — a traction-motor construction claim in the H02K family. US12580235B2 covers a battery-management system with more than three wireless monitoring devices inside the battery housing, relaying monitoring information back to the controller through a communication path. These are the motor and the battery-monitoring electronics — two more lines a supplier sells into the EV bill of materials.

The other half of the block is software, assistance and connectivity. US12576891B2 claims a vehicle-control device that executes location-based speed control differently depending on the autonomy mode — whether the vehicle is in autonomous driving with a monitoring obligation or without one:

The vehicle control device executes the location target speed control differently depending on whether the subject vehicle is in the autonomous driving with monitoring obligation or in the autonomous driving with no monitoring obligation.— Vehicle control device and vehicle control method, US12576891B2

The distinction the claim draws — monitoring obligation versus none — is the regulatory line between supervised and unsupervised automation, and a supplier holding issued coverage on control behavior that switches across that line is holding coverage tied to how automated-driving features are governed. Adjacent to it, US12576869B2 claims a display-control system that shows the driver whether the conditions for automated driving are or are not satisfied, and US12581201B2 covers an imaging-control method that lengthens camera exposure to keep traffic-signal colors identifiable — perception and HMI content for assisted and automated driving.

Reading the spread as a supplier position

Two further grants underline that DENSO files as a systems supplier, not a parts vendor. US12578952B2 claims an update-control device that reconciles update files arriving over both wireless and wired channels before delivering them to an electronic control unit — over-the-air software infrastructure. And US12581438B2 covers a 5G base station and user-equipment method, a telecommunications claim that reaches well beyond the engine bay. A pedal-mechanism claim, US12578748B2, rounds out the mechanical end of the spread.

For a markets reader, the financial reading is about where coverage is being added, expressed in counts and classes rather than a thesis. A supplier's grant spread maps its content map: power electronics, the motor, battery monitoring, automated-driving control and display, OTA updates and even cellular infrastructure all appear in one March window. That breadth is the data point for a supplier whose business is selling each of those lines into multiple automakers. The block establishes a map, not a ranking: as of March 17, 2026, DENSO holds fresh issued coverage across those zones, documented in 15 patent numbers with the company on the assignee line. Whether and how it enforces any of them is a separate matter the record does not address.