EAS and RFID systems incorporating field canceling core...

Details EAS and RFID systems incorporating field canceling core... EAS and RFID systems incorporating field canceling core...

2006-03-28

2006-03-28

Tweel, Jr., John (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C343S787000

Reexamination Certificate

active

07019651

ABSTRACT:
An EAS or RFID system including first and second core antenna systems. The first and second antenna systems establish magnetic fields having opposite directions and are positioned so that the fields at least partially cancel outside of an interrogation zone for detecting an EAS or RFID tag. There is also provided an EAS or RFID wherein the magnetic field direction established by a core antenna is varied at certain time intervals to minimize the effects of null zones in the interrogation zone.

REFERENCES:
patent: 4243980 (1981-01-01), Lichtblau
patent: 5061941 (1991-10-01), Lizzi et al.
patent: 5459451 (1995-10-01), Crossfield et al.
patent: 6011474 (2000-01-01), Coffey et al.
patent: 6060988 (2000-05-01), Copeland et al.
patent: 6064308 (2000-05-01), Janning et al.
patent: 6504513 (2003-01-01), Tryer et al.
patent: 6870507 (2005-03-01), Anguera Pros et al.
patent: 6930646 (2005-08-01), Yahata et al.
patent: 6947004 (2005-09-01), Mejia et al.

Affiliated with

Also associated with

Rating

EAS and RFID systems incorporating field canceling core... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with EAS and RFID systems incorporating field canceling core..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and EAS and RFID systems incorporating field canceling core... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3557381