Interestingly, I used to work for a company that worked with the London Black cab manufacture to developer ride-hailing from a mobile phone. This was back in the early 00's. I always wondered if there was any patent portfolio that is relevant to Lyft/Uber. It was called Zingo, sadly the only reference I could dig out from a cursory Google was a story about it going bust: https://www.theguardian.com/business/2004/nov/25/transportin...