Patent "Land grab"
Mike Gunderloy, a former Microsoft contractor, left the company and ceased using its software partially over his disagreement with the company's "sweeping land grab" including its attempt to patent the Ribbon interface. He refused to "contribut[e] to the eventual death of programming."[18] He states: "Microsoft itself represents a grave threat to the future of software development through its increasing inclination to stifle competition through legal shenanigans."[19][20]
Proponents of free software, such as KDE developer Jarosław Staniek,[21] have expressed beliefs that the patent cannot be acquired due to the ambiguity of prior art.[21]
As no patent has been acquired yet, they assert that anyone who has not signed the license can legally implement the concept in their applications without having to conform to Microsoft's requirements.[22] It has also been stated that Microsoft will not give their approval to products competing directly with Microsoft's.[23] If the design guidelines contain legal loopholes that give Microsoft a basis for future lawsuits against products exploiting this concept, those disenfranchised would not be able to inform others due to the non-disclosure agreement.[24]
Staniek notes that the ribbon concept has historically appeared extensively as "tabbed toolbars" in applications such as Macromedia HomeSite, Dreamweaver and Borland Delphi.[21] Early ribbon UIs were developed by Lotus for their product eSuite. Screen shots are still available in an IBM redbook about eSuite (page 109ff).[25]
Another popular application that has used the "tabbed toolbar" concept is Autodesk Maya.
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