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. 14, 1993
Filed:
Sep. 10, 1991
Applicant:
Inventors:
Paul Waterhouse, Copetown, CA;
John Stevens, Mississauga, CA;
Assignee:
ERS Associates Limited Partnership, Wilton, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G07G / ; G06F / ; G06K / ;
U.S. Cl.
CPC ...
364404 ; 235383 ; 34082535 ;
Abstract
Methods and apparatus are disclosed for locating electronic price tags in an electronic pricing system for use in retail environments. A host communicates with tags via a serial data bus, with identifier or switch chips geographically located within the system, each identifier or switch chip mediating communications between the host and a subset of the tags. By particular messages exchanged between tags and identifiers or switches, and by particular messages exchanged between identifiers or switches and the host, the host is able to confirm the geographic location of a particular tag.