Patents by Inventor Alan I. Rosenfeld

Alan I. Rosenfeld 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).

  • System for monitoring air pressure in a spare tire
    Patent number: 5513524
    Abstract: Air pressure in a spare tire of a land vehicle is monitored and a driver is signalled if that air pressure drops below a pre-set level. However, the signal only occurs when the driver applies the brakes of the vehicle. A first switch electrically connects an alarm to power and closes when air pressure in the spare tire drops below the preset level. A second switch connects the first switch to power when the vehicle brakes are applied so that both the air pressure controlled switch and the brake lights must be operated in order for power to be applied to the alarm.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: May 7, 1996
    Inventor: Alan I. Rosenfeld
  • Spare tire air pressure monitor
    Patent number: D337730
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: July 27, 1993
    Inventor: Alan I. Rosenfeld