US4774689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data input system with pointing device
Assignee: Toshiba Corp
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Filing: 1985-09-25
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Granted: 1988-09-27
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Expires: 2005-09-25
Abstract
Abstract According to a data input system with a pointing device, a keyboard device is provided with a pointing device interface and a key code generator. The keyboard device incorporates a microprocessor for generating a key code corresponding to a depressed key. The key code generator assigns data input through the pointing device interface to a nondefined key code. The data from the pointing device having been assigned a nondefined key code, is supplied as a key code from the keyboard device to a keyboard interface in a data processing device. The data processing device checks a specific bit of the data supplied thereto and determines that the received data is data originally supplied from the pointing device.
Inventors
- 👤 Toshikazu Morisawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:51
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/033; G06F3/038; G06F3/02; G06F3/023
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
A pointing device data input system having a pointing device for designating a two-dimensional coordinate point on a display screen, a keyboard device having a key code generator for generating a key code corresponding to each one of keys constituting a key matrix, and a data processing device connected to said keyboard device through a keyboard interface, said keyboard device comprising: pointing device interface means, arranged in said keyboard device, for connecting said pointing device and said keyboard device; and pointing device key code generating means for receiving, through said pointing device interface means, data from said pointing device, assigning the received data to a nondefined key code, and for outputting the nondefined key code to said data processing device as a defined key code from said keyboard device.
Claim 2
Dependent Claim
129 words
A pointing device data input system having a pointing device for designating a two-dimensional coordinate point on a display screen, a keyboard device having a key code generator for generating a key code corresponding to each one of keys constituting a key matrix, and a data processing device connected to said keyboard device through a keyboard interface, said keyboard device comprising: pointing device interface means, arranged in said keyboard device, for connecting said pointing device and said keyboard device; and pointing device key code generating means for receiving, through said pointing device interface means, data from said pointing device, assigning the received data to a nondefined key code, and for outputting the nondefined key code to said data processing device as a defined key code from said keyboard device.
Claim 3
Dependent Claim
79 words
A system according to claim 1, wherein said pointing device key code generating means outputs x- and y-coordinate selection signals and a bit selection signal to said pointing device interface means, and said pointing device interface means comprises: counters for counting x- and y-coordinate pulses from said pointing device; and a multiplexer for generating corresponding coordinate data in accordance with x- and y-coordinate selection signals and the bit selection signal supplied from said pointing device key code generating means.
Claim 4
Dependent Claim
33 words
A system according to claim 1, wherein the key code supplied to said data processing device has a bit representing that the key code is derived from the data from said pointing device.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |