The interesting number is buried in the architecture, not the press release. On February 14, 2023, GM was granted US11581841B2, "Electrical system having boost converter functionality." The CPC stack — H02P 27/08 (motor control), B60L 50/60 (EV propulsion), H02M 7/53871 (inverter) and B60L 53/14, 53/24, 53/53 (charging) — spans drive and charge.Voltage architecture is a cost story. Boosting voltage inside the system can reduce current, which lets engineers use thinner conductors and gain efficiency — trade-offs that ripple into both component cost and energy use. For GM, the patent is a position in how it engineers the cost-and-efficiency balance of its EV electrical systems.The honest read is that an architecture patent is a lever, not a margin. Whether it lowered cost or improved efficiency in production lives in powertrain economics and cost-of-revenue, not the grant. The patent is the upstream artifact.For the ledger reader, keep this as supporting evidence of drivetrain cost-engineering direction, subordinate to the financials. Any cost claim rests on GM's filing on sec.gov, surfaced via EdgarBeast as the evidence index.Read it as a 2023 drivetrain-architecture position from GM. The cost-and-efficiency payoff is answered downstream in the powertrain numbers.