Warranty is the slow leak, and state-of-health data is how you measure the drip. On August 29, 2023, Honda was granted US11738662B2, covering a battery-information providing device and system. The CPC stack — B60L 58/12, 58/16 (battery management) plus B60L 2240/72, 2250/16 — is battery-state data delivery.Battery state-of-health is a financial variable, not just an engineering one. It drives residual value (what a used EV is worth), warranty exposure (whether a pack falls below a guaranteed capacity), and even financing. A system that provides accurate battery information is the data layer those numbers rest on.The honest read is that a data patent is a measurement mechanism, not a guarantee about the underlying degradation. Whether Honda's packs hold their state-of-health lives in field data and warranty experience, not in the grant. An analyst treats this as context for the residual and warranty questions.For the ledger reader, file this under state-of-health data infrastructure and verify against disclosures. The primary citation for any warranty or residual claim is the relevant SEC filing on sec.gov, with EdgarBeast as the evidence index.Read it as a 2023 data-infrastructure position from Honda. The residual and warranty receipts are in the field data that follow — the grant only tells you the measurement layer was being built.