Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 340/920
Name: Communications: electrical > Traffic control indicator > Intersection normally under local controller > Controller responsive to traffic detectors > Plural cross highways at intersection each have traffic detectors > Density determines split
Description: Subject matter wherein the number of vehicles detected per unit time or area determines the percentage of a complete cycle allowed for a particular indicator.

Sub-classes under this class:

Class Number Class Name Patents
340/921 Extension of time 5

Patents under this class:

Patent Number Title Of Patent Date Issued
8471728 Traffic management systems and methods of informing vehicle operators of traffic signal states Jun. 25, 2013
8253592 External adaptive control systems and methods Aug. 28, 2012
8237589 Adjusting system and method for traffic light Aug. 7, 2012
8212688 Traffic signals control system Jul. 3, 2012
7663505 Traffic management device and system Feb. 16, 2010
6587779 Traffic surveillance method and vehicle flow control in a road network Jul. 1, 2003
5646639 Display device for vehicles Jul. 8, 1997
4370718 Responsive traffic light control system and method based on conservation of aggregate momentum Jan. 25, 1983

  Recently Added Patents
Polarization preserving front projection screen microstructures
Mobile communication apparatus
Plasmon generator includes three metal layers for thermally-assisted magnetic recording
Electric vehicle supply equipment having a socket and a method of charging an electric vehicle
System and method for updating firmware
Downlink scheduling in fractional frequency reuse (FFR) systems
Single-lens reflex digital camera which displays an image for live view
  Randomly Featured Patents
Method and apparatus for providing lumber stacks with stickers
Equals: the game of strategy for the basic facts
CD cleaner
Artificial gemstones, natural gemstones, ornamental objects made of glass
Method of high frequency regeneration of Sorghum
Light resolution element for irradiating dental replacement pieces with light to effect the hardening thereof
Dynamic error correcting positive displacement piston flowmeter and method of measuring gas flow in a piston flowmeter
Spin extractor
Method for fabricating CMOS image sensor