Microsoft
was just granted a patent for the Page Up and Page Down keystrokes. Patent
7415666 is for the following;
...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.
For their next trick, I'm guessing Microsoft will try to patent all Written Materials, Editing, Lighting, Packaging, Hair Styles, Promotional Consideration, Lack of Continuity, Music, Lyrics, Tonal Construction, Liner Notes, Timbre, Pitch, Duration, Intensity, Basin, Tub And Toilet Bowl, Polarity, Magnetic Field, Shipping, Shrink Wrapping, Deli Tray, Mile's Too Sweet Pecs, You Are A Child Of The Universe! No Less Than The Trees, Wango Tango, Locust Bean Gum, The Fighting Arnovich Brothers, Mother, Jugs And Speed.