Berezin filed a patent covering technology for online data transfer.
On July 7, 1961, Evelyn Berezin filed U.S. patent application US 3,231,865, titled "On-line data transfer apparatus." This invention addressed the technical challenge of transferring data between computing devices in real time or 'on-line,' a concept that was still relatively novel in the early 1960s.
On-line data transfer was foundational to the development of transaction-processing systems, where information needed to move instantly between terminals and central processors—exactly the kind of architecture required for applications like airline reservations and banking. Berezin's early work in this domain positioned her at the forefront of what would become essential infrastructure for the digital economy.
This patent, filed the same day as a companion patent on data transfer apparatus, exemplifies the intensity and focus of Berezin's inventive output during this period. Her pioneering contributions to on-line data transfer technology directly presaged her celebrated design of one of the earliest computerized airline reservation systems for United Airlines in the mid-1960s, a system that depended on exactly this kind of real-time data exchange between remote terminals and central computers.