Patents Assigned to Applied Research & Technology, Inc.
  • Unique computer power system with backup power
    Patent number: 5578876
    Abstract: A computer power system comprises an AC-to-DC power supply for providing DC power to the computer during the presence of AC line power and a backup power supply for providing DC power from batteries directly to the DC operated components of the computer system, completely bypassing the AC to DC power supply, when AC line voltage is absent or low.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: November 26, 1996
    Assignee: Applied Research & Technology, Inc.
    Inventor: Timothy P. Crampton
  • Unique computer power system with backup power
    Patent number: 5237258
    Abstract: A computer power system comprises an AC-to-DC power supply for providing DC power to the computer during the presence of AC line power and a backup power supply for providing DC power from batteries directly to the DC operated components of the computer system, completely bypassing the AC to DC power supply, when AC line voltage is absent or low.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: August 17, 1993
    Assignee: Applied Research and Technology, Inc.
    Inventor: Timothy P. Crampton
  • Self-compensating equalizer
    Patent number: 4939782
    Abstract: A multi-band graphic equalizer is provided that includes a plurality of controllable frequency response determining elements, each element having a primary effect in its primary frequency band and a secondary effect in at least one adjacent frequency band, a graphic input device for entering an input that graphically represents a desired frequency response characteristic, and a controller connected between the input means and the frequency response determining elements for calculating the necessary frequency response characteristic for each controllable frequency response element based on the in band and out of band effects of each element to produce the desired overall frequency response characteristic and for generating a plurality of sets of control signals, one set of control signals for each frequency response determining element, so that the overall frequency response characteristic produced by the plurality of frequency response determining elements is as close as possible to the desired frequency resp
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: July 3, 1990
    Assignee: Applied Research & Technology, Inc.
    Inventors: Anthony A. Gambacurta, Jr., Mitchell J. Milton, Richard A. Neatrour
  • Unique computer power system with backup power
    Patent number: 4885521
    Abstract: A computer power system comprises an AC-to-DC power supply for providing DC power to the computer during the presence of AC line power and a backup power supply for providing DC power from batteries directly to the DC operated components of the computer system, completely bypassing the AC to DC power supply, when AC line voltage is absent or low.
    Type: Grant
    Filed: December 15, 1987
    Date of Patent: December 5, 1989
    Assignee: Applied Research & Technology, Inc.
    Inventor: Timothy P. Crampton
  • Power-supply/battery back-up power supply/battery charger combination
    Patent number: 4760322
    Abstract: A. Power supply comprising an AC to DC power supply and a DC to DC power supply and a DC battery charging circuit within a single device, which device provides continuous DC power to a load regardless of the presence or absence of the AC power source.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: July 26, 1988
    Assignee: Applied Research & Technology, Inc.
    Inventor: Timothy P. Crampton