@SFOMuseum Twitter Posts This is SFO Museum's archive of the @SFOMuseum Twitter account.
📸: Curta calculator patent drawing 1949 United States Patent and Trademark Office R2021.0919.001 Curta mechanical pocket calculator and parts c. 1950 Contina AG, Liechtenstein Courtesy of Cliff Stoll L2021.0902.005, .006. This tweet was posted on February 16, 2022.