Nation Patents, lawsuits, safety concerns — then tragedy. A timeline of OceanGate’s Titan sub. June 22, 2023June 22, 2023 Dinah Voyles Pulver, USA TODAY Comments Off on Patents, lawsuits, safety concerns — then tragedy. A timeline of OceanGate’s Titan sub. Timeline: History of how OceanGate developed and promoted its Titan submersible to take tourists to the Titanic