05253162 is referenced by 91 patents and cites 15 patents.

A system for automatic collection of tolls includes a toll facility, an in-vehicle toll processor having memory for storing a toll-money-available quantity purchased by the user, and a toll-facility-identification site that transmits a toll-facility-identifier signal indicating the identity of the upcoming toll facility and the toll to be collected. As the vehicle approaches the identification site, the in-vehicle processor receives the identifier signal and calculates the toll to be debited. When the vehicle passes through the toll facility, the facility transmits a toll-collect signal instructing the in-vehicle toll processor to debit the calculated toll from memory. The in-vehicle processor debits the calculated amount and transmits an acknowledgement signal to the toll facility.

This application is related to the subject matter of application Ser. No. 525,103 filed May 17, 1990 now U.S. Pat. No. 5,144,553, issued Sep. 1, 1992, and application Ser. No. 524,654 filed May 17, 1990 now U.S. Pat. No. 5,086,389, issued Feb. 4, 1992, having as common inventors John J. Hassett and John M. Harrison.

Title
Shielding field method and apparatus
Application Number
7/525864
Publication Number
5253162
Application Date
May 17, 1990
Publication Date
October 12, 1993
Inventor
John J Hassett
Marblehead
MA, US
Agent
Lahive & Cockfield
Assignee
AT COMM Incorporated
MA, US
IPC
G08G 1/065
G08G 1/00
G07G 1/12
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