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:
Feb. 18, 2003
Filed:
Oct. 12, 1999
Timothy Fred Ahlers, Redmond, WA (US);
Andrew J. Becker, Bellevue, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A recalculation engine version stamp is employed to determine whether a spreadsheet program file should be fully recalculated upon opening. When a spreadsheet program file is recalculated and saved, a recalculation engine version stamp is written to the file. The recalculation engine version stamp corresponds to the version of the calculation engine of the application program that last recalculated and saved the program file. When the program file is opened in a spreadsheet application program, the recalculation engine version stamp is compared to the calculation engine version number of the spreadsheet application program. If the calculation engine version number of the spreadsheet application program is more recent than the recalculation engine version stamp of the spreadsheet program file, then a full recalculation of the spreadsheet program file is performed.