Patents by Inventor Paul G. Mandel

Paul G. Mandel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Thermostatically controlled enclosure for temperature sensitive equipment
    Patent number: 5769705
    Abstract: A thermostatically controlled enclosure for a small computer device includes a housing and a control circuit connected to a temperature signal generator such as a transistor. A circulating fan controlled by the output of the control circuit is mounted to the housing. Also provided is an LED indicator or audible alarm responsive to an over temperature condition within the housing. The control circuit consists of six basic blocks: a temperature to voltage converter; a high current operational amplifier; a fan on/off control; an over temperature sensor network an oscillator; and an LED or alarm driver.
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: June 23, 1998
    Assignee: Alliance Peripheral Systems, Inc.
    Inventors: John O'Callaghan, John Nelson, Paul G. Mandel, R. Paul McGraw
  • Switchable active termination for SCSI peripheral devices
    Patent number: 5422580
    Abstract: A switchable active termination device internally mounted within a peripheral device and electrically connected to the end of a Small Computer Systems Interface (SCSI) bus cable. Through use of a pair of SCSI active terminator circuit chips, the termination device actively terminates the data lines of the bus cable in a first operating mode in response to a first digital command by providing precise resistive pull-up to a predetermined value on each data line. In a second mode of operation responsive to a second digital command, the termination device disconnects all terminating resistors. Activation of the termination modes is logically driven from an included switch, with visual indication of the presence of an active termination state provided by a light emitting diode.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: June 6, 1995
    Assignee: APS Technologies
    Inventors: Paul G. Mandel, Richard A. Ralston, Jr., Gary E. Robertson
  • Enclosure for a removable cartridge drive, disk drive, or hard disk drive
    Patent number: D408379
    Type: Grant
    Filed: January 19, 1998
    Date of Patent: April 20, 1999
    Assignee: La Cie, Ltd.
    Inventors: R. Paul McGraw, Paul G. Mandel
  • Switchable active termination for SCSI peripheral devices
    Patent number: RE36789
    Abstract: A switchable active termination device internally mounted within a peripheral device and electrically connected to the end of a Small Computer Systems Interface (SCSI) bus cable. Through use of a pair of SCSI active terminator circuit chips, the termination device actively terminates the data lines of the bus cable in a first operating mode in response to a first digital command by providing precise resistive pull-up to a predetermined value on each data line. In a second mode of operation responsive to a second digital command, the termination device disconnects all terminating resistors. Activation of the termination modes is logically driven from an included switch, with visual indication of the presence of an active termination state provided by a light emitting diode.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: July 25, 2000
    Assignee: La Cie, Limited
    Inventors: Paul G. Mandel, Richard A. Ralston, Jr., Gary E. Robertson