Patents by Inventor Otto P. Fest, Sr.

Otto P. Fest, Sr. 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).

  • Signal or loop powered automatic multicolor display and controller
    Patent number: 9054725
    Abstract: The present circuitry provides for an expansion of loop powered technology preferably employed on 4-20 mA. The invention provides for extracting energy from current loops for use in displays, alarms, controls and communication. Further, the circuit allows for a reporting of instrument status and loss of signal to eliminate operator error in assuming the meter is faulty when in actuality a loss of signal has occurred.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: June 9, 2015
    Inventors: Otto P. Fest, Sr., Noel Smith
  • Loop-powered current-loop controller and method
    Patent number: 6285094
    Abstract: An apparatus in the form of a current-loop controller driven by the EMF in the loop without the need for external power operates devices connected in the loop (in series) within the current operating range.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: September 4, 2001
    Inventor: Otto P. Fest, Sr.
  • Personal flotation device and related system for maintaining human body in partially-submerged horizontal position
    Patent number: 6213832
    Abstract: A personal flotation device is configured and sized so that it is adapted to be positioned beneath a person's body to cause the person to be suspended in equilibrium in a partially-submerged state. The device includes a ring-shaped body and a plurality of side floats extending radially away from the ring-shaped body.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: April 10, 2001
    Inventor: Otto P. Fest, Sr.