On May 20, The Block reported that the developers behind Bancor have filed a patent infringement lawsuit against Uniswap Labs and the Uniswap Foundation, accusing them of illegally using their underlying decentralized trading platform technology. The lawsuit was filed by the Bprotocol Foundation, a non-profit organization that supports the development of the Bancor protocol, and LocalCoin Ltd., the original developer of Bancor. The lawsuit has been filed in the U.S. District Court for the Southern District of New York, alleging that the Uniswap protocol is built on Bancor's patented constant product automated market maker (CPAMM) infrastructure. Bancor invented the CPAMM model in 2016 and developed a mechanism to support permissionless on-chain transactions through smart contracts. The protocol published a white paper and filed a U.S. patent application in 2017. Bancor obtained two patents in the same year and launched the first CPAMM-based DEX. The lawsuit claims that Uniswap's original protocol launched in November 2018 used the same CPAMM design without authorization. Bancor accused Uniswap of “profiteering” by deploying its intellectual property without consent.