The interesting number is buried in the switching waveform, not the press release. On July 15, 2025, GM was granted US12362742B1, "Variable slew rate gate driver for hybrid switch power module." The CPC codes — H03K 17/162, 17/122 and 17/6871 — are squarely gate-drive switching control.Slew rate — how fast a switch transitions — is a classic efficiency-versus-noise trade-off in power electronics. A variable slew-rate driver lets the inverter run faster transitions when it can, cutting switching loss, while backing off when noise or stress demands. That efficiency feeds into range and into the cost of cooling and filtering around the module.The honest read is that a gate-driver patent is a fine lever, not a margin. Whether it improved inverter efficiency or lowered surrounding-component cost in production lives in powertrain economics, not the grant. The patent is the upstream artifact.For the ledger reader, keep this as supporting evidence of inverter cost-and-efficiency 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 2025 power-electronics cost-engineering position from GM. The efficiency-and-cost payoff is answered downstream in the powertrain numbers.