How the Windows Taskbar Manages Open Programs
Microsoft's 1999 patent defines the mechanics of the Windows taskbar, allowing users to track open programs and manage window layouts through a persistent interface element.
Original patent title: “Taskbar with start menu”
Microsoft's 1999 patent defines the mechanics of the Windows taskbar, allowing users to track open programs and manage window layouts through a persistent interface element. Granted to Microsoft Corp in 1999 with 32 claims and 124 forward citations.
Key facts
Coverage
What does this patent actually cover?
The patent describes a persistent user interface element, known as the taskbar, that displays non-overlapping sub-elements (buttons) for every active application window. It allows a user to interact with these buttons using a cursor to bring specific windows to the foreground or trigger context-sensitive menus for window management, such as cascading or tiling. The system also supports hiding the taskbar entirely when a window is maximized, or anchoring it to different edges of the screen, providing a centralized control hub for multitasking.
The gap
What does this patent NOT cover?
- Does not cover window management systems that rely solely on keyboard shortcuts without a visual taskbar element.
- Does not cover taskbars that fail to provide a non-overlapping sub-element for each active application.
- Does not cover mobile-style 'app drawer' interfaces that do not maintain a persistent list of currently running windows.
- Does not cover touch-based gesture interfaces that do not utilize a cursor-based interaction model.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
The innovation lies in the taskbar's dual role as both a status indicator (showing what is running) and a control surface (providing context menus for window arrangement) that remains accessible even when other windows are active.
Schematic visualization of the patent's claim structure. Hand-drawn diagrams in progress for each landmark patent.
Where you've seen this
Real-world examples
Windows 95 Taskbar
Windows 98 Taskbar
Windows XP Taskbar
Modern Windows 10/11 Taskbar
Why it matters
The bigger picture
This patent codified the desktop metaphor that defined the Windows 95 and 98 era, which became the standard for personal computing for decades. It established a consistent way for users to navigate multiple open programs, effectively solving the 'lost window' problem that plagued earlier operating systems.
Filed
November 4, 1997
Granted
July 6, 1999
Market context
Who's building on this
Companies in this space
Microsoft continues to iterate on this design in Windows 11, focusing on taskbar grouping and pinning. Other desktop environments like GNOME and KDE Plasma have built upon these concepts, adapting the persistent taskbar model for Linux-based workflows.
Market impact
This patent helped solidify the Windows user interface as the industry standard, making it difficult for competing desktop OS developers to replicate the exact taskbar behavior without licensing or design workarounds. It effectively defined the 'desktop' experience for billions of users, cementing the taskbar as an essential component of modern GUI design.
Claim 1 — Plain English
What this patent covers
The patent describes a persistent user interface element, known as the taskbar, that displays non-overlapping sub-elements (buttons) for every active application window. It allows a user to interact with these buttons using a cursor to bring specific windows to the foreground or trigger context-sensitive menus for window management, such as cascading or tiling. The system also supports hiding the taskbar entirely when a window is maximized, or anchoring it to different edges of the screen, providing a centralized control hub for multitasking.
The clever bit
The innovation lies in the taskbar's dual role as both a status indicator (showing what is running) and a control surface (providing context menus for window arrangement) that remains accessible even when other windows are active.
What it does not cover
- Does not cover window management systems that rely solely on keyboard shortcuts without a visual taskbar element.
- Does not cover taskbars that fail to provide a non-overlapping sub-element for each active application.
- Does not cover mobile-style 'app drawer' interfaces that do not maintain a persistent list of currently running windows.
- Does not cover touch-based gesture interfaces that do not utilize a cursor-based interaction model.
Patent timeline
Application submitted to the patent office
Application published, typically 18 months after filing
Patent officially issued
PatentBrief Score
Impact Score
High impact
Citation count
40/40
Highly cited
Claim breadth
20/20
Very broad protection
Recency
0/20
Older than 20 years
Assignee scale
20/20
Major company or institution
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
Heuristic Value Estimate
What this patent might be worth
$115K – $369K
Midpoint $230K · expired or expiring · industry ×1.6
Heuristic only — blends forward/backward citation counts, claim scope, time remaining, litigation history, and CPC-derived industry baseline. Real valuations need a professional appraisal.
The original legal language
Original claims
32 claims as filed with the patent office.
Concepts involved
Citations
Patent lineage
Cite this patent
Malamud, M. A., Sullivan, K. D., Ellison-Taylor, I. M., Oran, D. P., Belfiore, J. D., Bogdan, J. L., & Chew, C. H. (1999). How the Windows Taskbar Manages Open Programs (U.S. Patent No. 5,920,316). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/5920316/windows-explorer-tree-view
Auto-generated from the patent record. Double-check author order and the issue date against the official USPTO document before submitting.
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Common Questions
Frequently Asked Questions
What does How the Windows Taskbar Manages Open Programs cover?
Microsoft's 1999 patent defines the mechanics of the Windows taskbar, allowing users to track open programs and manage window layouts through a persistent interface element.
Who owns patent US 5920316?
Microsoft Corp owns this patent, granted in 1999.
When does this patent expire?
This patent has expired and is now in the public domain — anyone can use the invention freely.
What is patent US 5920316 cited by?
This patent has been cited by 124 later patents that build on its ideas.
What problem does this patent solve?
This patent codified the desktop metaphor that defined the Windows 95 and 98 era, which became the standard for personal computing for decades. It established a consistent way for users to navigate multiple open programs, effectively solving the 'lost window' problem that plagued earlier operating systems.
What does this patent NOT cover?
Does not cover window management systems that rely solely on keyboard shortcuts without a visual taskbar element.
Same assignee
More from Microsoft Corp
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