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. 19, 2009
Filed:
Mar. 01, 2006
Vladimir Sadovsky, Bellevue, WA (US);
Franc J. Camara, Redmond, WA (US);
Keisuke Tsuchida, Redmond, WA (US);
Lyman Cooper Partin, Bellevue, WA (US);
Vladimir Sadovsky, Bellevue, WA (US);
Franc J. Camara, Redmond, WA (US);
Keisuke Tsuchida, Redmond, WA (US);
Lyman Cooper Partin, Bellevue, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A computer system uses simplified device drivers for operating hardware devices. A simplified device driver for a hardware device of a given device type, such as a flatbed scanner, works with a system-supplied common driver for that given device type. The common driver and the simplified driver together function like a regular device driver. The simplified device driver implements a small number of entry point functions corresponding to a pre-selected set of operation commands 'generic' to hardware devices of that given device type. When an application makes a request for an operation by the device, the request is passed through a device driver interface (DDI) to the common driver. The common driver then calls the entry point functions in the simplified device driver to carry out the requested operation.