US Patent 9536359 Delivery system via electronic lockboxes

A cam lock for cabinets, drawers, drug cabinets, credenzas, sliding doors, lockers, mail boxes and other door type applications is compact in size, fits an existing cam lock opening and provides electronic access via a keypad or other electronic access. In a particular embodiment the lock is long, narrow and low in profile so as to fit on the margin of a steel or wood file cabinet, compatible with the cam lock opening already provided. The lock can be on a secure delivery box of each of a series of customers, in a system for secure delivery and pickup of the goods as ordered by the customers.