Permabit Assigned Patent

Permabit, Inc., Cambridge, MA, has been assigned a patent (9,104,716) developed by Margolus, Norman H., Somerville, MA, for a “history preservation in a computer storage system.”

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A method by which a disk-based distributed data storage system is organized for protecting historical records of stored data entities. The method comprises recording distinct states of an entity, corresponding to different moments of time, as separate entity versions coexisting within the distributed data storage system, and assigning expiration times to the entity versions independently within each of a plurality of storage sites according to a shared set of rules, before which times deletion is prohibited.“

The patent application was filed on January 7, 2004 (10/752,839).