Patents by Inventor Stephen W. Pierce

Stephen W. Pierce 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).

  • TRACTOR TRAILER REFRIGERATION UNIT
    Publication number: 20240131894
    Abstract: A reefer truck power unit employs a plurality of power sources including roof mounted solar panels, momentum generation, shore power and high capacity storage batteries. The refrigeration system is configured for refrigerating a payload area of the vehicle utilizing power from the power sources, and employs a voltage converter for augmenting the power from the propulsion vehicle source for use with a native vehicle charging//starting system, and a transport load transformer for converting power from the power sources to 3 phase power for powering the refrigeration system. A bank of batteries stores power from the sources for subsequent dispersal to the refrigeration unit.
    Type: Application
    Filed: December 6, 2023
    Publication date: April 25, 2024
    Applicant: eNow Systems LLC
    Inventors: Gerald Larson, Jeffrey C. Flath, Robert W. Doane, Philip R. Pierce, Stephen Lasher, Ryan Kennedy Kemmet
  • Time multiplexed, false alarm resistant magnetically actuated security system
    Patent number: 5534849
    Abstract: A magnetically actuated switch system (10) has reduced sensitivity to false alarms and reduced power consumption and resistance to physical and magnetic tampering. The system includes a signal processing circuit controlled by a microprocessor (16) that selectively enables magnetic sensors (12, 38), and compares the corresponding sensor outputs (76) to automatically calibrated level and predetermined timing characteristics.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: July 9, 1996
    Assignee: Sentrol, Inc.
    Inventors: Kevin B. McDonald, Stephen W. Pierce, Michael Benowitz, David S. Terrett