Patent US5408250A successfully refreshed from Google Patents.
US5408250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable computer for short-range graphical multiparty communication
Assignee: Xerox Corp
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Filing: 1993-08-30
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Granted: 1995-04-18
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Expires: 2013-08-30
Abstract
Abstract A portable device for silent graphical communication. The device has a display screen on which a user may scribble notes and information using a stylus. These notes, which are then broadcast by the device, are received by other similar devices and displayed on the screens of the other devices. User of the other devices can respond to the received information by scribbling their own notes. The ensuing conversations may be password protected.
Inventors
- 👤 Eric A. Bier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:27
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00095; H04N1/00103; G; G06; G06F; G06F3/00; G06F3/01; G06F3/048; G06F3/0487; G06F3/0488; G06F3/04883; G08; G08C; G08C21/00; G09; G09B; G09B5/00; G09B5/08; G09B5/14; H04N1/00127; H04N1/0035; H04N1/00352; H04N1/00392; H04N1/00405; H04N1/00408; H04N1/00411; H04N1/00413; H04N1/42; H04N1/44; H04N1/4406; H04N1/4413; H04N1/00204; H04N1/00206; H04N2201/00; H04N2201/0008; H04N2201/0034; H04N2201/0048; H04N2201/0055; H04N2201/0065; H04N2201/0067; H04N2201/0096
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
162 words
A portable device for silent, graphical communication comprising: a screen for receiving and displaying a graphical input; an input device, coupled to said screen, for inputting a first graphical input to said screen; means, coupled to said input device, for converting said first graphical input to a first graphical data set; means, coupled to said means for converting said first graphical input to a first graphical data set, for transmitting via wireless communication said first graphical data set; means for receiving a second graphical data set, wherein said second graphical data set is broadcast from a remote location; means, coupled to said means for receiving a second graphical data set and to said screen, for converting said second graphical data set to a second graphical input to be displayed on said screen; and means, coupled to said means for transmitting and said means for receiving, for autonomously allocating a time period to transmit said first graphical data set and avoid data collisions.
Claim 2
Dependent Claim
162 words
A portable device for silent, graphical communication comprising: a screen for receiving and displaying a graphical input; an input device, coupled to said screen, for inputting a first graphical input to said screen; means, coupled to said input device, for converting said first graphical input to a first graphical data set; means, coupled to said means for converting said first graphical input to a first graphical data set, for transmitting via wireless communication said first graphical data set; means for receiving a second graphical data set, wherein said second graphical data set is broadcast from a remote location; means, coupled to said means for receiving a second graphical data set and to said screen, for converting said second graphical data set to a second graphical input to be displayed on said screen; and means, coupled to said means for transmitting and said means for receiving, for autonomously allocating a time period to transmit said first graphical data set and avoid data collisions.
Claim 3
Dependent Claim
18 words
The portable device for silent, graphical communication of claim 1 wherein said screen comprises a liquid crystal display.
Claim 4
Dependent Claim
18 words
The portable device for silent, graphical communication of claim 2 wherein said screen comprises a video display terminal.
Claim 5
Dependent Claim
18 words
The portable device for silent, graphical communication of claim 1 wherein said input device comprises an electronic stylus.
Claim 6
Dependent Claim
18 words
The portable device for silent, graphical communication of claim 1 wherein said input device comprises a track ball.
Claim 7
Dependent Claim
46 words
The portable device for silent, graphical communication of claim 1 wherein said means for converting said first graphical input to a first graphical data set and said means for converting said second graphical data set to a second graphical input comprise: a microprocessor; and a digitizer.
Claim 8
Dependent Claim
34 words
The portable device for silent graphical communication of claim 1 wherein said means for transmitting a first graphical data set and said means for receiving a second graphical data set comprise a radio transceiver.
Claim 9
Dependent Claim
34 words
The portable device for silent graphical communication of claim 1 wherein said means for transmitting a first graphical data set and said means for receiving a second graphical data set comprise an infrared transceiver.
Claim 10
Dependent Claim
52 words
The portable device for silent graphical communication of claim 1 further comprising: a microprocessor, coupled to said screen, said means for transmitting and said means for receiving a second graphical data set; and a memory, coupled to said microprocessor, for storing a series of graphical data sets under control of said microprocessor.
Claim 11
Dependent Claim
118 words
A portable device for silent graphical communication comprising: a liquid crystal display, coupled to a data bus, for receiving and displaying a graphical input; an input device, coupled to said liquid crystal display, for inputting a first graphical input to said screen; a transceiver, coupled to said data bus, for transmitting, via wireless communication a first graphical data set and receiving a second graphical data set broadcast from a remote location; a microprocessor, coupled to said data bus, for converting said first graphical input to said first graphical data set converting said second graphical data set into a second graphical input and autonomously allocating a time period to transmit said first graphical data set and avoid data collisions.
Claim 12
Dependent Claim
118 words
A portable device for silent graphical communication comprising: a liquid crystal display, coupled to a data bus, for receiving and displaying a graphical input; an input device, coupled to said liquid crystal display, for inputting a first graphical input to said screen; a transceiver, coupled to said data bus, for transmitting, via wireless communication a first graphical data set and receiving a second graphical data set broadcast from a remote location; a microprocessor, coupled to said data bus, for converting said first graphical input to said first graphical data set converting said second graphical data set into a second graphical input and autonomously allocating a time period to transmit said first graphical data set and avoid data collisions.
Claim 13
Dependent Claim
31 words
The portable device for silent graphical communication of claim 10 further comprising: a memory, coupled to said data bus, for storing an instruction set and a plurality of graphical data sets.
Claim 14
Dependent Claim
30 words
The portable device for silent graphical communication of claim 10 further comprising: a speaker, coupled to said data bus, for conveying an audio signal to a user of said device.
Claim 15
Dependent Claim
18 words
The portable device for silent graphical communication of claim 10 further comprising an antenna coupled to said transceiver.
Claim 16
Dependent Claim
17 words
The portable device for silent graphical communication of claim 10 wherein said transceiver comprises a radio transceiver.
Claim 17
Dependent Claim
17 words
The portable device for silent graphical communication of claim 10 wherein said transceiver comprises an infrared transceiver.
Claim 18
Dependent Claim
18 words
The portable device for silent graphical communication of claim 10 wherein said input device comprises an electronic stylus.
Claim 19
Dependent Claim
18 words
The portable device for silent graphical communication of claim 10 wherein said input device comprises a track ball.
Claim 20
Independent Claim
113 words
A method for multiparty, silent graphical communication using portable devices comprising the steps of: writing a message on a screen of a first portable device using an input device; representing said message within said first portable device as a graphical data set; transmitting, from said first portable device said graphical data set, via wireless communication, wherein said step of transmitting comprises the step of autonomously allocating a given time interval and a given duration of time to transmit wherein a data collision is avoided; receiving at a second portable device said graphical data set; and converting said graphical data set to said message for display on a screen of said second portable device.
Claim 21
Independent Claim
113 words
A method for multiparty, silent graphical communication using portable devices comprising the steps of: writing a message on a screen of a first portable device using an input device; representing said message within said first portable device as a graphical data set; transmitting, from said first portable device said graphical data set, via wireless communication, wherein said step of transmitting comprises the step of autonomously allocating a given time interval and a given duration of time to transmit wherein a data collision is avoided; receiving at a second portable device said graphical data set; and converting said graphical data set to said message for display on a screen of said second portable device.
Claim 22
Dependent Claim
84 words
The method for multiparty silent graphical communication of claim 18 further comprising the steps of: writing a second message on said screen of said second portable device; representing said second message within said second portable device as a second graphical data set; transmitting from said second portable device said second graphical data set; receiving at said first portable device said second graphical data set; converting said second graphical data set into said second message for display on said screen of said first portable device.
Claim 23
Dependent Claim
22 words
The method for multiparty silent graphical communication of claim 18 further comprising the step of: assigning a conversation number to said message.
Claim 24
Dependent Claim
22 words
The method for multiparty silent graphical communication of claim 20 further comprising the step of: assigning a page number to said message.
Claim 25
Dependent Claim
27 words
The method for multiparty silent graphical communication of claim 18 wherein said step of writing a message further comprises the step of writing with an electronic stylus.
Claim 26
Dependent Claim
27 words
The method for multiparty silent graphical communication of claim 18 wherein said step of writing a message further comprises the step of writing with a track ball.
Claim 27
Dependent Claim
23 words
The method for multiparty silent graphical communication of claim 18 wherein said step of transmitting comprises the step of transmitting an infrared signal.
Claim 28
Dependent Claim
23 words
The method for multiparty silent graphical communication of claim 18 wherein said step of transmitting comprises the step of transmitting a radio signal.
Claim 29
Dependent Claim
25 words
The method for multiparty silent graphical communication of claim 20 wherein said step of displaying said message comprises the step of selecting said conversation number.
Claim 30
Dependent Claim
24 words
The method for multiparty silent graphical communication of claim 26 wherein said step of displaying said message comprises the steps of entering a password.
Claim 31
Dependent Claim
28 words
The method for multiparty silent graphical communication of claim 18 wherein the step of transmitting further comprises: selecting a frequency from among a given set of possible frequencies.
Claim 32
Dependent Claim
20 words
The method for multiparty silent graphical communication of claim 18 further comprising the step of storing said message in memory.
Claim 33
Dependent Claim
23 words
The method for multiparty silent graphical communication of claim 20 further comprising the step of storing said message in memory by conversation number.
Claim 34
Dependent Claim
46 words
The method for multiparty silent graphical communication of claim 18 wherein said step of transmitting from said first portable device further comprises the step of transmitting a first portable device identification number and a first end of transmission signal including a second portable device identification number.
Claim 35
Dependent Claim
46 words
The method for multiparty silent graphical communication of claim 19 wherein said step of transmitting from said second portable device further comprises the step of: transmitting said second portable device identification number and a second end of transmission signal including said first portable device identification number.
Claim 36
Dependent Claim
32 words
The portable device for silent graphical communication of claim 10 wherein an operational frequency of said transceiver can be selected by a user from among a given set of possible transceiver frequencies.
Claim 37
Dependent Claim
19 words
The portable device for silent graphical communication of claim 1 wherein said input device comprises a touch sensitive screen.
Claim 38
Dependent Claim
19 words
The portable device for silent graphical communication of claim 10 wherein said input device comprises a touch sensitive screen.
References Cited (Backward Citations)
US4310317A
Cited
US4394649A
Cited
US4545023A
Cited
US4609776A
Cited
US4644352A
Cited
GB2165679A
Cited
US5150954A
Cited
US4713808A
Cited
US5168271A
Cited
US5159713A
Cited
US4794634A
Cited
WO1988009091A1
Cited
GB2206718A
Cited
US5027198A
Cited
EP0321084A2
Cited
WO1989005023A1
Cited
US5051985A
Cited
WO1990016030A1
Cited
US5239466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |