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It seems Microsoft is racing approaching 10,000 mark for their US Patent. At the other hand, Microsoft has a long story for its patents that are many argue about it , or can sometimes demonstrate or were based on earlier work carried by others or common basic self-evident idea. One example is patent on mouse wheel that can scroll up and scroll down .
And now Microsoft did it again with Page Up and Page Down keystrokes, the patent was granted on August 19 under US patent number 7,415,666 " Method and system for navigating paginated content in page-based increments " and was applied for the patent in 2005. For your information, Page Up and Page Down buttons have been in existence since the beginning of personal computer.
The Patent abstract for this patent stated :
A method and system in a document viewer for scrolling a substantially exact increment in a document, such as one page, regardless of whether the zoom is such that some, all or one page is currently being viewed. In one implementation, pressing a Page Down or Page Up keyboard key/button allows a user to begin at any starting vertical location within a page, and navigate to that same location on the next or previous page. For example, if a user is viewing a page starting in a viewing area from the middle of that page and ending at the bottom, a Page Down command will cause the next page to be shown in the viewing area starting at the middle of the next page and ending at the bottom of the next page. Similar behavior occurs when there is more than one column of pages being displayed in a row.via zdnet
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