USPTO Issues Microsoft A Patent For 60's Technology

theodp writes "On Tuesday, the USPTO issued U.S. patent no. 6,594,674 to Microsoft for a System and method for creating multiple files from a single source file, which describes a fundamental IBM Mainframe file structure, the Partitioned Data Set, that's been around since the 60's and is familiar to virtually anyone who's used a mainframe text editor in the past five decades. To the amazement of readers of an IBM newsgroup, neither Microsoft nor the USPTO examiners seem to be aware of the existence of the Mainframe-based prior art, which is not cited in the patent."