Simjian's earliest verified self-service banking filing (filed April 9, 1959): a machine activated by coded subscriber identification that validates identity and time period, then invalidates the ID against reuse. Batiz-Lazo & Reid identify this — not a mythical 1939 patent — as the real start of the Simjian record; it underpinned the 1961 Bankograph trial at a New York City bank.

The canonical US ATM patent: Don Wetzel's Docutel team's card-actuated currency dispenser (currency packets, format/identity verification, controlled cash drawer). Anchor of the US first-generation dispensing era; part of a family with US3651986A and US3662343A.

Docutel's networked Total Teller-era system patent whose depository module — envelope transport, serial numbering device, envelope stackers — is the canonical description of first/second-generation ATM deposit: a sealed envelope, serial-stamped for audit, with zero validation of contents. The deposit is a promise, verified later by a human.

Circulation-type cash handling with mode switching (receive-only / dispense-only / both) driven by container fill levels — the operational logic that makes recycling viable without constant clerk intervention. Omron's recycling IP later merged with Hitachi's in the 2004 Hitachi-Omron Terminal Solutions JV.

Early Japanese cash-recycling patent: deposited notes are sorted by denomination into pocket sections and re-dispensed as withdrawal cash. Documents the Japanese lead (Toshiba/Hitachi/Omron/Glory) in note recycling roughly two decades before US/European deployers adopted it — deposit automation as an inventory technology, not just a customer convenience.

Hitachi's bill recycle module (BRM) family: auto-replenishes recycling boxes from a supply cassette only when the customer sensor shows nobody waiting, pausing if a customer approaches. Early evidence of Hitachi treating the recycler as an inventory-management system, not just a transport.

Diebold's late-1990s recycling ABM program: doubles detection, deskewing and centering of documents on a central transport that both accepts deposits (denominating and storing them) and re-dispenses them — note validation moved permanently inside the recycling path.

The foundational jitter patent: intermittent stop-start card transport during insertion/ejection so an externally mounted skimmer cannot recover a clean magnetic-stripe waveform, while the internal head reads continuously once the card is enclosed. Basis of 'jitter' anti-skimming shipped industry-wide.

Firmware-level mutual authentication between ATM components: identity-data hashing and encrypted key exchange so hardware and software components verify each other before transacting. Notable for its Brazilian inventor team — Brazil's epidemic of ATM fraud in the early 2000s made Diebold's Brazilian operation a security R&D source.

Late-stage NCR check-imaging patent: an image-based depositing ATM with dual cameras (front/rear images) that emails or web-links the acknowledgement instead of printing it. Evidence of how thoroughly the imaging core was settled by 2008 — the patentable frontier had moved to the receipt.

Nidec Sankyo's orientation-based defense: conveying the card in its short-side (width) direction with an abutting end-alignment mechanism, and detecting both longitudinal card ends to reject improper insertions that could enable illegal data acquisition — the OEM-side sibling of the 'rotate the stripe away from the skimmer' concept Diebold commercialized as ActivEdge.

Anti-internal-skimming hardware: an internal plate with pre-weakened bend/break zones blocks insertion of skimmers inside the reader throat and deliberately deforms if extracted, bricking the reader — designed against the 'deep-insert' skimmer wave that followed successful external-skimmer countermeasures.

The dominant OEM absorbing the anti-skimming stack into the reader itself: a disturbing-magnetic-field (jamming) generator built into the card reader, with soft-adhesive-filled gaps between core/bobbin/board/housing to suppress the audible vibration noise jamming coils cause — a manufacturability refinement showing jamming is now a standard integrated subsystem.

Current state of the art on file: multiple ML models trained on terminal telemetry compete, the best is deployed, and models continuously retrain -- explicitly covering ATMs among self-service terminals. Shows predictive maintenance moving from threshold rules (2009-2011 filings) to MLOps. Status: pending as of verification (2026-08).