The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 2005
Filed:
Oct. 18, 1999
Craig F. Russ, Berwyn, PA (US);
Steven E. Clarke, Newtown Square, PA (US);
James C. Prestifilippo, Lansdale, PA (US);
Clark C. Kogen, West Chester, PA (US);
Craig F. Russ, Berwyn, PA (US);
Steven E. Clarke, Newtown Square, PA (US);
James C. Prestifilippo, Lansdale, PA (US);
Clark C. Kogen, West Chester, PA (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
A file accessing scheme allows logical files to be processed outside of the native operating system and its logical I/O subsystem. When an application program wants to process a file outside of the native operating system, a file information block is built with a special type of file designated as 'virtual.' A pointer is provided within the file information block to a handler. The handler is a library that is external to the native operating system. The library processes the file without using the native operating system. Upon completion of the processing, the handler returns the operation results to the file information block and control is transferred back to the application program.