US4831504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holder with semiconductor lighting device
Assignee: JUNICHI NISHIZAWA PROFESSOR OF TOHOKU UNIVERSITY (MOLECULAR ELECTRONICS DIVISION)
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Filing: 1986-11-13
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Granted: 1989-05-16
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Expires: 2006-11-13
Abstract
Abstract An illuminated tool or key, in which a light source is detachably secured to a surface of the tool or key. Additionally, the emitted light can be modulated to perform an additional keying function when received by the lock. A three-color light emitter is preferable.
Inventors
- 👤 Junichi Nishizawa
- 👤 Yoshikatsu Tamaoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:50
CPC Classifications
A; A44; A44B; A44B15/00; A44B15/005; E; E05; E05B; E05B17/00; E05B17/10; E05B17/103; F; F21; F21V; F21V21/00; F21V21/08; Y; Y10; Y10S; Y10S362/00; Y10S362/80; Y10S362/802; Y10T; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7062; Y10T70/80; Y10T70/8432; Y10T70/8676
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
An illuminated key, comprising: a key having a working portion at a first end thereof; lighting means for projecting light in a first direction, said lighting means comprising a light emitting diode; at least one switch of a momentary contact type; signal generating means for impressing a predetermined coded pulse modulated signal on light emitted from said light emitting diode in response to actuation of said switch; attaching means for detachably attaching said lighting means to said key on a surface thereof extending from said first end to a second end opposite said first end, wherein attachment of said lighting means to said key directs said first direction of said lighting means towards said first end; a power source; and means for housing said lighting means and said power source.
Claim 2
Dependent Claim
130 words
An illuminated key, comprising: a key having a working portion at a first end thereof; lighting means for projecting light in a first direction, said lighting means comprising a light emitting diode; at least one switch of a momentary contact type; signal generating means for impressing a predetermined coded pulse modulated signal on light emitted from said light emitting diode in response to actuation of said switch; attaching means for detachably attaching said lighting means to said key on a surface thereof extending from said first end to a second end opposite said first end, wherein attachment of said lighting means to said key directs said first direction of said lighting means towards said first end; a power source; and means for housing said lighting means and said power source.
Claim 3
Dependent Claim
42 words
An illuminated key as recited in claim 1, wherein said lighting means includes a plurality of light emitting diodes, said signal generating means impressing said predetermined signal on light emitted from said light emitting diodes in response to actuation of said switch.
Claim 4
Dependent Claim
27 words
An illuminated tool as recited in claim 2, wherein said plurality of light emitting diodes comprises at least three said light emitting diodes emitting differently colored light.
Claim 5
Dependent Claim
19 words
An illuminated key as recited in claim 3, in which said at three light emitting diodes are molded together.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |