US5111004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stylus for handwriting identification
Assignee: Kumahira Safe Co Inc
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Filing: 1991-05-23
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Granted: 1992-05-05
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Expires: 2011-05-23
Abstract
Abstract A stylus formed of a shaft containing pressure sensors and useful in signature verification and in identification of individuals. The pressure sensors are imbedded in and integral with the shaft of the stylus at a predetermined distance from the tip used for writing. The sensors are preferably disposed in an annulus and located in each of four quadrants surrounding the shaft enabling three-axis pressure detection.
Inventors
- 👤 Larry S. Gullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:39
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/033; G06F3/0354; G06F3/03545; B; B43; B43K; B43K7/00; B43K7/005; B43K8/00; B43K8/22; G06V; G06V10/00; G06V10/10; G06V10/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
A stylus for generating signals in response to tactile pressure comprising: a shaft having a tip; at least a first pressure-sensitive sensor embedded in said shaft at a first location at a first displacement from said tip; at least a second pressure-sensitive sensor embedded in said shaft at a second location at said first displacement from said tip; and at least a third pressure-sensitive sensor embedded in said shaft at a third location at said first displacement from said tip.
Claim 2
Dependent Claim
80 words
A stylus for generating signals in response to tactile pressure comprising: a shaft having a tip; at least a first pressure-sensitive sensor embedded in said shaft at a first location at a first displacement from said tip; at least a second pressure-sensitive sensor embedded in said shaft at a second location at said first displacement from said tip; and at least a third pressure-sensitive sensor embedded in said shaft at a third location at said first displacement from said tip.
Claim 3
Dependent Claim
49 words
The stylus according to claim 1 further including a fourth pressure-sensitive sensor embedded in said shaft at a fourth location at said first displacement from said tip, said first, second, third and fourth sensors being disposed in an annulus about said shaft at a preselected distance from said tip.
Claim 4
Dependent Claim
57 words
The stylus according to claim 1 wherein said pressure-sensitive sensors are disposed at a position adjacent a junction of a barrel portion and a cone portion of the shaft in order to sense pressure in the shaft as between gripping fingers and the tip in contact with a writing surface, at a preselected distance from said tip.
Claim 5
Dependent Claim
24 words
The stylus according to claim 2 wherein said first pressure-sensitive sensor and said third pressure-sensitive sensor are disposed opposing one another across said shaft.
Claim 6
Dependent Claim
24 words
The stylus according to claim 4 wherein said second pressure-sensitive sensor and said fourth pressure-sensitive sensor are disposed opposing one another across said shaft.
Claim 7
Dependent Claim
62 words
The stylus according to claim 5 wherein said first pressure-sensitive sensor and said third pressure-sensitive sensor are disposed along a first axis and said second pressure-sensitive sensor and said fourth pressure-sensitive sensor are disposed along a second axis, said first axis being orthogonal to said second axis, and said first and second axis being orthogonal to a central axis of said shaft.
Claim 8
Dependent Claim
45 words
The stylus according to claim 6 wherein said first pressure-sensitive sensor and said third pressure-sensitive sensor are sensitive only to pressures along said first axis and wherein said second pressure-sensitive sensor and said fourth pressure-sensitive sensor are sensitive only to pressures along said second axis.
Claim 9
Dependent Claim
13 words
The stylus according to claim 1 wherein said shaft is substantially circularly cylindrical.
References Cited (Backward Citations)
US3906444A
Cited
US3891555A
Cited
USRE29765E
Cited
US3986403A
Cited
US4078226A
Cited
US4111052A
Cited
US4513437A
Cited
US4793193A
Cited
GB2162982A
Cited
US4646351A
Cited
US4786764A
Cited
US4896543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-05 | 1995-11-04 | 1996-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-05 | 1999-11-04 | 2000-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-05 | 2003-11-04 | 2004-05-05 | $7700.00 | Window Closed / Lapsed |