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:
Oct. 16, 2012
Filed:
Sep. 27, 2007
David P. Erickson, Stillwater, MN (US);
Michele A. Waldner, Minneapolis, MN (US);
James P. Mcgee, Cedar, MN (US);
Swagata R. Banerjee, North Oaks, MN (US);
David P. Erickson, Stillwater, MN (US);
Michele A. Waldner, Minneapolis, MN (US);
James P. McGee, Cedar, MN (US);
Swagata R. Banerjee, North Oaks, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
The invention provides one or more signal line structures that produce an electromagnetic field having a magnitude of at least an interrogation threshold of a radio frequency identification (RFID) tag for a substantial portion of an interrogation region. The signal lines may be made from copper and laid across a shelf in a storage area. The electromagnetic field may cause the tag to backscatter radio frequency (RF) signals to an RFID reader via the signal line.