How a Handheld Thumb-Controlled Computer Mouse Works
A handheld mouse designed to be held in the air, using the thumb to control a cursor while fingers rest in ergonomic channels.
Original patent title: “USRE40324E1 - Thumb actuated X-Y input device”
A handheld mouse designed to be held in the air, using the thumb to control a cursor while fingers rest in ergonomic channels. Granted to Dhol New Ventures LLC in 2008 with 65 claims and 43 forward citations.
Key facts
Coverage
What does this patent actually cover?
This device is a handheld computer mouse that does not require a desk surface. It uses a housing shaped to align with the user's forearm and thumb, featuring specific channels for the index and middle fingers. The user controls the cursor (x-y input) by moving their thumb across a sensor, such as a touchpad or trackball, positioned at the end of the device. It also includes adjustable 'zero force' touch switches within the finger channels that can be tuned to match the user's specific finger length.
The gap
What does this patent NOT cover?
- Does not cover standard desktop mice that require a flat surface for tracking.
- Does not cover devices that rely on wrist or arm movement for cursor navigation.
- Does not cover touchscreens or trackpads that are integrated into a laptop or tablet chassis.
- Does not cover input devices that do not include the specific finger-channel and thumb-platform geometry described.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
The device uses the thumb's basal joint circumduction—the natural, circular motion of the thumb—as the primary input mechanism, combined with adjustable light-beam sensors to accommodate different hand sizes.
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
Handheld ergonomic pointing devices
Air mouse peripherals for presentations
Specialized accessibility input controllers
Why it matters
The bigger picture
This patent addresses repetitive strain injuries by promoting a 'neutral' hand posture. It represents an attempt to move computer interaction away from the desk and into a handheld, mobile-friendly form factor, similar to how modern VR controllers or specialized ergonomic mice function today.
Filed
April 20, 2006
Granted
May 20, 2008
Market context
Who's building on this
Companies in this space
The patent is held by Dhol New Ventures. While this specific design is niche, the broader industry of ergonomic peripheral manufacturers and VR input designers continues to experiment with handheld, thumb-centric control schemes.
Market impact
This patent highlights the ongoing industry effort to decouple computer input from the constraints of a flat desk surface. It reflects a design philosophy that prioritizes ergonomic alignment, influencing the development of vertical mice and handheld pointing devices intended to reduce wrist fatigue.
Claim 1 — Plain English
What this patent covers
This device is a handheld computer mouse that does not require a desk surface. It uses a housing shaped to align with the user's forearm and thumb, featuring specific channels for the index and middle fingers. The user controls the cursor (x-y input) by moving their thumb across a sensor, such as a touchpad or trackball, positioned at the end of the device. It also includes adjustable 'zero force' touch switches within the finger channels that can be tuned to match the user's specific finger length.
The clever bit
The device uses the thumb's basal joint circumduction—the natural, circular motion of the thumb—as the primary input mechanism, combined with adjustable light-beam sensors to accommodate different hand sizes.
What it does not cover
- Does not cover standard desktop mice that require a flat surface for tracking.
- Does not cover devices that rely on wrist or arm movement for cursor navigation.
- Does not cover touchscreens or trackpads that are integrated into a laptop or tablet chassis.
- Does not cover input devices that do not include the specific finger-channel and thumb-platform geometry described.
Patent timeline
Application submitted to the patent office
Application published, typically 18 months after filing
Patent officially issued
PatentBrief Score
Impact Score
Moderate
Citation count
33/40
Moderately cited
Claim breadth
20/20
Very broad protection
Recency
5/20
Granted 10–20 years ago
Assignee scale
0/20
Independent or smaller assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more →
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
$43K – $138K
Midpoint $86K · 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
65 claims as filed with the patent office.
Concepts involved
Citations
Patent lineage
Cite this patent
Crawford, P. J. (2008). How a Handheld Thumb-Controlled Computer Mouse Works (U.S. Patent No. RE40,324). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/RE40324/playstation-dualshock-controller
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 a Handheld Thumb-Controlled Computer Mouse Works cover?
A handheld mouse designed to be held in the air, using the thumb to control a cursor while fingers rest in ergonomic channels.
Who owns patent US RE40324?
Dhol New Ventures LLC owns this patent, granted in 2008.
When does this patent expire?
This patent is expected to expire on May 20, 2028, when the invention enters the public domain.
What is patent US RE40324 cited by?
This patent has been cited by 43 later patents that build on its ideas.
What problem does this patent solve?
This patent addresses repetitive strain injuries by promoting a 'neutral' hand posture. It represents an attempt to move computer interaction away from the desk and into a handheld, mobile-friendly form factor, similar to how modern VR controllers or specialized ergonomic mice function today.
What does this patent NOT cover?
Does not cover standard desktop mice that require a flat surface for tracking.
Patent monitoring