Three of us are starting up a new company.
Partner A brought the original idea. He also has the IP, the development of which was paid for by a third party. Moving forward, A will only dedicate 10% of his time to the company (and has for the past six weeks).
Partner B has invested significant effort on the technology and has manufactured a prototype, being compensated by a third party. He will dedicate 50% of his time to the company (and has for the last six weeks).
Partner C didn't develop the technology. He joined recently and is organizing the business case and finding strategic partners. He will dedicate 100% of his time to the company (and has for the last six weeks).
What would be a fair distribution of equity between A, B, and C?