US12494909 — Verifiable randomness (VRF) for decentralized computing granted
EV-038 · USPTO · 2025-12 · Confidence 100%
Sergey Nazarov / Alex Coventry / Ari Juels — Inventors — SmartContract Chainlink Limited SEZC
Detail
USPTO granted US12494909 covering the production of verifiable random values within a decentralized oracle network. An oracle applies a private key to an unpredictable seed to produce a random value and a cryptographic proof of correctness that any party can verify on-chain. Filed May 11, 2021, granted December 9, 2025.
Why it matters
Chainlink holds a granted USPTO patent on on-chain verifiable randomness. Any competitor replicating VRF's on-chain proof approach faces patent infringement risk. The patent was first filed in May 2021 with priority to May 2020.
Primary source: USPTO Official Gazette US12494909 — SmartContract Chainlink Limited SEZC (granted Dec 9, 2025)
Official Document
Topics: Patent, VRF, Randomness, Cryptography, Gaming, NFT, IP