The resurrected
Five expired trading patents, rebuilt as playable, interactive demos. Nothing here needs a license — the mechanisms these patents once protected are public domain. Play with the actual invention.
Wagner Matching Engine
An automated futures-matching exchange, filed in November 1983 — one of the earliest attempts to put a human trading pit inside a computer.
News-Sentiment Trading Signal Backtester
Filed in 2002, before 'NLP' meant much more than keyword rules and bag-of-words models. Expired ten months before ChatGPT shipped and NLP became a household word.
Virtual Specialist AMM
A software 'specialist' that always quotes a two-sided market and takes the other side of every trade — the automated-market-maker idea, patented in 1996, years before AMMs became the backbone of on-chain trading.
Financial Advisory System (1997)
Financial Engines — co-founded by Nobel laureate William Sharpe — patented automated portfolio advice in 1997, a full decade and a half before 'robo-advisor' became a marketing category.
Linked Global Exchange
A satellite-linked scheme for trading commodities across time zones and exchanges as one continuous market — filed in 1984, when a 24-hour global market was still a proposal, not a fact of life.