US5218389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable interactive multimedia presentation unit
Assignee: Individual
•
Filing: 1992-01-27
•
Granted: 1993-06-08
•
Expires: 2012-01-27
Abstract
Abstract A portable interactive multimedia presentation unit comprising a portable computer and a portable carrying case equipped to hold a projector unit with mounting accessories and a conductive shroud to enclose a light path from the computer screen to the inlet of the projector unit.
Inventors
- 👤 Thomas A. Harlon
- 👤 Joseph F. Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:38
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/30; G03B21/132; G03B21/134
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
A portable interactive multimedia presentation unit comprising: a) a computer; b) a projector means to project an image from an essentially vertical backlighted screen of said computer to a vertical surface, said projector means comprising: 1) a lower section with optics to project said image vertically; 2) an upper section with a square cross section machined to fit closely into a top part of said lower section with optical means aligned with optics in said lower section with said optical means allowing said upper section to be fitted onto said lower section to project said vertical image received from said lower section at right angles thereby allowing said image to be projected on any of four walls of a room wherein said computer with said multimedia presentation unit is being used; d) an adjustable conductive shroud means to enclose a light path from said backlighted screen to an entrance to said projector means.
Claim 2
Dependent Claim
153 words
A portable interactive multimedia presentation unit comprising: a) a computer; b) a projector means to project an image from an essentially vertical backlighted screen of said computer to a vertical surface, said projector means comprising: 1) a lower section with optics to project said image vertically; 2) an upper section with a square cross section machined to fit closely into a top part of said lower section with optical means aligned with optics in said lower section with said optical means allowing said upper section to be fitted onto said lower section to project said vertical image received from said lower section at right angles thereby allowing said image to be projected on any of four walls of a room wherein said computer with said multimedia presentation unit is being used; d) an adjustable conductive shroud means to enclose a light path from said backlighted screen to an entrance to said projector means.
Claim 3
Dependent Claim
101 words
A portable interactive multimedia presentation unit as in claim 1 further comprising a carrying case type means for transporting and setting up said projector means; said carrying case type means further comprising: a) a storage compartment for a mounting strip rigidly attached to a lower part of an optical system for said projector means, an upper part of an optical system for said projector means, a conductive shroud, an electrical extension cord, a light bulb, and miscellaneous computer accessories; b) a pair of bases hingedly attached with dual extensible legs hingedly attached in each one of said pair of hinged bases.
Claim 4
Dependent Claim
29 words
A portable interactive multimedia presentation unit as in claim 2 wherein said carrying case type means also includes a pair of speakers attached to fold into said case means.
Claim 5
Dependent Claim
71 words
A portable interactive multimedia presentation unit comprising: a) computer with a detachable keyboard and backlighted b) a manually adjustable projector means to project an image in any one of four directions, 90 degrees with said backlighted screen being held in a fixed position; c) a shroud enclosing a light path from said backlighted screen to an inlet to said projector means; d) a mounting means to adjustable support said projector means.
Claim 6
Dependent Claim
71 words
A portable interactive multimedia presentation unit comprising: a) computer with a detachable keyboard and backlighted b) a manually adjustable projector means to project an image in any one of four directions, 90 degrees with said backlighted screen being held in a fixed position; c) a shroud enclosing a light path from said backlighted screen to an inlet to said projector means; d) a mounting means to adjustable support said projector means.
Claim 7
Dependent Claim
28 words
A portable interactive multimedia presentation unit as in claim 4 wherein said shroud is constructed to be conductive and is grounded to a case of said projector means.
Claim 8
Dependent Claim
38 words
A portable interactive multimedia presentation unit as in claim 4 wherein said mounting means comprises a U shaped base, cooperating with extensible legs and a mounting bar for said projector means to allow positioning of said projector means.
References Cited (Backward Citations)
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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) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |