William E Stelzel

US Patent:

7698223, Apr 13, 2010

Filed:

Apr 21, 2005

Appl. No.:

11/111651

Inventors:

Andrew D. Padawer - Sammamish WA, US
Katharine O. Holdsworth - Kirkland WA, US
Miguel A. Claudio - Redmond WA, US
Scott R. Shell - Kirkland WA, US
William E. Stelzel - Issaquah WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 17/60
H04L 9/00

US Classification:

705 51, 705 52, 705 54, 705 57, 705 59

Abstract:

A pluggable file-based DRM (digital rights management) API (application program interface) layer for applications and engines. The invention defines a pluggable file-based DRM API layer such that mobile operators can choose to use any file-based DRM (FDRM) engine in their final product. An FDRM engine can be content agnostic (e. g. , can range from an executable to a media file or ring-tone). In accordance with the invention, an application can become DRM aware by calling the novel file-based DRM APIs. Any FDRM engine can be plugged into the novel API layer such that applications can use the protected content. The API layer of the subject invention can be designed such that applications that are DRM aware by using the file-based DRM API layer can be DRM engine agnostic.

US Patent:

20060277223, Dec 7, 2006

Filed:

Jun 3, 2005

Appl. No.:

11/144893

Inventors:

Anoop Gupta - Seattle WA, US
William Stelzel - Issaquah WA, US
Anh Tran - Seattle WA, US
Gary Hall - Redmond WA, US

Assignee:

Microsoft Corporation - Redmond WA

International Classification:

G06F 17/30

US Classification:

707201000

Abstract:

Systems and methodologies that facilitate synchronization of a mobile device with a source, via employing a file change tracking database table created in non-volatile memory to designate files for synchronization. The subject invention includes a file modification logger that detects and track changes to files across multiple file systems. The file change tracking database table has a plurality of columns such as: a unique identification column that identifies a file, a file name, previous time the file was changed, and previous time the file was synchronized with a particular machine. A list of files that have changed between a current time and an earlier time can be designated for synchronization, by evaluating when was the file last changed and/or synchronized with a source device (e.g., a desktop, lap top and the like.)