Patents Assigned to Thomas Ross Welch
  • Self-cancelling parking meter
    Patent number: 4043117
    Abstract: Parking meter carries photosensor directed at the controlled parking space. The operator of a parked car energizes the meter by coin insertion and meter cranking and thus activates the photosensor. When the vehicle is moved out of the parking space, the photosensor detects the movement and resets the parking meter to zero.
    Type: Grant
    Filed: October 8, 1975
    Date of Patent: August 23, 1977
    Assignees: Michele Maresca, Thomas Ross Welch
    Inventors: Michele Maresca, Thomas Ross Welch