The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 24, 1996
Filed:
Aug. 10, 1994
Applicant:
Inventors:
Steven K Orr, Loveland, OH (US);
Daniel G Kindel, Mason, OH (US);
Assignee:
Cincinnati Microwave, Inc., Cincinnati, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08G / ;
U.S. Cl.
CPC ...
340902 ; 34082573 ;
Abstract
An emergency vehicle contains a transmitter for generating and transmitting a pair of fixed continuous wave signals which are distinguishable from each other in a preselected frequency band. A passenger vehicle contains a receiver which detects and distinguishes the pair of signals and generates an alert if the signals are determined to be at predetermined frequencies.