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:
Jul. 26, 1977
Filed:
Mar. 16, 1976
Applicant:
Inventor:
Arthur Edward Brewster, Thaxted, EN;
Assignee:
International Standard Electric Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61L / ; G01S / ;
U.S. Cl.
CPC ...
343 / ; 246 / ; 2461 / ; 343 / ; 343 / ; 340 / ; 340 47 ;
Abstract
A low power radar mounted on the train interrogates passive transponders located along the track. Inductive coupling arrangements associated with the radar and each of the transponders inhibits responses from transponders other than the one immediately underneath the radar, and also for indicating failure of transponders.