How the Apple Mac Dock Magnifies Icons
Apple's 1999 patent on the macOS Dock, which shrinks a row of app icons to save screen space and smoothly magnifies them as your mouse pointer glides over them.
Original patent title: “User interface for providing consolidation and access”
Apple's 1999 patent on the macOS Dock, which shrinks a row of app icons to save screen space and smoothly magnifies them as your mouse pointer glides over them. Granted to Apple Inc in 2008 with 140 claims and 232 forward citations.
Key facts
Coverage
What does this patent actually cover?
The patent covers a graphical user interface bar containing a row of interactive tiles representing apps, documents, or web links. When a user moves their cursor close to the bar, a processor dynamically enlarges the tile closest to the cursor, along with its immediate neighbors, using a smooth mathematical sine-wave scaling function. To prevent the growing icons from overlapping or spilling off the screen, the system simultaneously shifts the remaining unmagnified icons sideways along the bar. For example, when you hover over the Safari icon on a Mac, it balloons in size while the Mail and Calendar icons slide outward to make room.
The gap
What does this patent NOT cover?
- Does not cover static application bars or taskbars where icons remain a constant size when hovered.
- Does not cover icon magnification triggered by touch gestures on a mobile screen without a cursor.
- Does not cover grids or menus of icons where magnification occurs in two dimensions rather than along a single linear bar.
- Does not cover magnification effects where adjacent icons do not shift position to accommodate the enlarged icon.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
Instead of just blowing up one icon, the system uses a sine-wave function to smoothly scale down the magnification of neighboring icons. This creates a wave-like bubble effect that guides the user's eye and prevents jarring visual jumps as the mouse sweeps across the bar.
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
The macOS Dock
The iPadOS Dock
Linux desktop environments mimicking OS X like Plank or Latte Dock
Why it matters
The bigger picture
This patent protected one of the most iconic visual elements of Mac OS X when it debuted in 2001. It solved a critical design challenge of the era: how to keep dozens of shortcuts accessible on small, low-resolution monitors without permanently swallowing valuable screen real estate.
Filed
December 20, 1999
Granted
October 7, 2008
Market context
Who's building on this
Companies in this space
Apple remains the primary user and developer of this technology in macOS and iPadOS. Open-source Linux desktop projects like GNOME and KDE, along with third-party utility developers, have built similar dock applications, often carefully designing around Apple's specific mathematical scaling claimsclaimsThe numbered statements at the end of a patent that legally define what the inventor owns.Read more →.
Market impact
This patent helped establish the visual identity of Mac OS X, distinguishing it sharply from Windows. It triggered design trends in web development and software UI, where fisheye magnification menus became popular interactive elements in the mid-2000s.
Claim 1 — Plain English
What this patent covers
The patent covers a graphical user interface bar containing a row of interactive tiles representing apps, documents, or web links. When a user moves their cursor close to the bar, a processor dynamically enlarges the tile closest to the cursor, along with its immediate neighbors, using a smooth mathematical sine-wave scaling function. To prevent the growing icons from overlapping or spilling off the screen, the system simultaneously shifts the remaining unmagnified icons sideways along the bar. For example, when you hover over the Safari icon on a Mac, it balloons in size while the Mail and Calendar icons slide outward to make room.
The clever bit
Instead of just blowing up one icon, the system uses a sine-wave function to smoothly scale down the magnification of neighboring icons. This creates a wave-like bubble effect that guides the user's eye and prevents jarring visual jumps as the mouse sweeps across the bar.
What it does not cover
- Does not cover static application bars or taskbars where icons remain a constant size when hovered.
- Does not cover icon magnification triggered by touch gestures on a mobile screen without a cursor.
- Does not cover grids or menus of icons where magnification occurs in two dimensions rather than along a single linear bar.
- Does not cover magnification effects where adjacent icons do not shift position to accommodate the enlarged icon.
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
5/20
Granted 10–20 years ago
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
$144K – $461K
Midpoint $288K · 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
140 claims as filed with the patent office.
Concepts involved
Citations
Patent lineage
Cite this patent
Lindsay, D. J., Ording, B., & Jobs, S. P. (2008). How the Apple Mac Dock Magnifies Icons (U.S. Patent No. 7,434,177). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/7434177/itunes-digital-music-store
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 Apple Mac Dock Magnifies Icons cover?
Apple's 1999 patent on the macOS Dock, which shrinks a row of app icons to save screen space and smoothly magnifies them as your mouse pointer glides over them.
Who owns patent US 7434177?
Apple Inc owns this patent, granted in 2008.
When does this patent expire?
This patent is expected to expire on October 7, 2028, when the invention enters the public domain.
What is patent US 7434177 cited by?
This patent has been cited by 232 later patents that build on its ideas.
What problem does this patent solve?
This patent protected one of the most iconic visual elements of Mac OS X when it debuted in 2001. It solved a critical design challenge of the era: how to keep dozens of shortcuts accessible on small, low-resolution monitors without permanently swallowing valuable screen real estate.
What does this patent NOT cover?
Does not cover static application bars or taskbars where icons remain a constant size when hovered.
Same assignee
More from Apple Inc
Patent monitoring