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Class Information
Number: 713/321
Name: Electrical computers and digital processing systems: support > Computer power control > Power conservation > Programmable calculator with power saving feature
Description: Subject matter wherein means or steps are provided to reduce an amount of power consumed by a programmable calculator.

Patents under this class:
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Patent Number Title Of Patent Date Issued
5553294 Portable computer powered by rechargeable batteries Sep. 3, 1996
5553296 Touch screen power control in a computer system Sep. 3, 1996
5546590 Power down state machine for PCMCIA PC card applications Aug. 13, 1996
5546591 Distributed power management system for battery operated personal computers Aug. 13, 1996
5544082 Method and system for placing a computer in a reduced power state Aug. 6, 1996
5542035 Timer-controlled computer system shutdown and startup Jul. 30, 1996
5539400 Ultra-low power, scan on demand keypad encoder Jul. 23, 1996
5539681 Circuitry and method for reducing power consumption within an electronic circuit Jul. 23, 1996
5535401 Method and system of power and thermal management for a data processing system using object-oriented program design Jul. 9, 1996
5532935 Electronic device capable of automatically controlling power assumption of components employed in accordance with operating time period by user Jul. 2, 1996
5532945 Power budgetting in a computer system having removable devices Jul. 2, 1996
5532524 Distributed power regulation in a portable computer to optimize heat dissipation and maximize battery run-time for various power modes Jul. 2, 1996
5530879 Computer system having power management processor for switching power supply from one state to another responsive to a closure of a switch, a detected ring or an expiration of a timer Jun. 25, 1996
5530878 Simplified power system with a single power converter providing low power consumption and a soft on/off feature Jun. 25, 1996
5523776 Photovoltaic array for computer display Jun. 4, 1996
5521854 Power-saving control for a control unit in a computer system May. 28, 1996
5513361 Method and apparatus for reducing power consumption of a fan in a computer system Apr. 30, 1996
5511013 Low power consumption type one-chip microcomputer having a plurality of peripheral circuits Apr. 23, 1996
5511201 Data processing apparatus, power supply controller and display unit Apr. 23, 1996
5511202 Desktop computer system having zero-volt system suspend and control unit for ascertaining interrupt controller base address Apr. 23, 1996
5511203 Power management system distinguishing between primary and secondary system activity Apr. 23, 1996
5511204 Performing system tasks at power-off using system management interrupt Apr. 23, 1996
5504910 Power management unit including software configurable state register and time-out counters for protecting against misbehaved software Apr. 2, 1996
5504907 Power management system with adaptive control parameters for portable computer Apr. 2, 1996
5504908 Power saving control system for computer system Apr. 2, 1996
5502689 Clock generator capable of shut-down mode and clock generation method Mar. 26, 1996
5501534 Electronic apparatus which is automatically initialized when normal operation is resumed after the apparatus has been in a low power consumption mode Mar. 26, 1996
5499201 Method for reducing the electricity consumption of microprocessor-based apparatuses, in particular those for public telephone stations Mar. 12, 1996
5497494 Method for saving and restoring the state of a CPU executing code in protected mode Mar. 5, 1996
5493670 Adaptive disk spin-down method for managing the power distributed to a disk drive in a laptop computer Feb. 20, 1996
5493684 Power management architecture including a power management messaging bus for conveying an encoded activity signal for optimal flexibility Feb. 20, 1996
5493685 Display control apparatus capable of changing luminance depending on conditions of power supply circuit Feb. 20, 1996
5488575 Portable work station and data collection terminal including switchable multi purpose touch screen display Jan. 30, 1996
5485623 Information processor having high speed and safety resume system Jan. 16, 1996
5485625 Method and apparatus for monitoring external events during a microprocessor's sleep mode Jan. 16, 1996
5483656 System for managing power consumption of devices coupled to a common bus Jan. 9, 1996
5483464 Power saving apparatus for use in peripheral equipment of a computer Jan. 9, 1996
5481733 Method for managing the power distributed to a disk drive in a laptop computer Jan. 2, 1996
5481732 CRT monitor power control unit Jan. 2, 1996
5481730 Monitoring and control of power supply functions using a microcontroller Jan. 2, 1996
5475271 Power source control system for electronic device and expansion unit connected thereto Dec. 12, 1995
5475654 Intermittent operation circuit Dec. 12, 1995
5475847 Power saving control system for computer system with feature of selective initiation of power saving control Dec. 12, 1995
5475848 Supervisory control method and power saving control unit for computer system Dec. 12, 1995
5471621 Information processing systems having a main CPU and a sub-CPU which controls the overall system to achieve power savings Nov. 28, 1995
5461652 Clock control circuit Oct. 24, 1995
5457801 Power saving system Oct. 10, 1995
5454112 Personal computer or the like with a light source controller for a display apparatus Sep. 26, 1995
5454114 Microcontroller power-up delay Sep. 26, 1995
5449238 Method for operating a recording device powered by at least one rechargeable accumulator Sep. 12, 1995

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