Title:
RADIO FREQUENCY IDENTIFICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO2001026048
Kind Code:
A3
Abstract:
An object identification system and method detects the presence of a target object in a field of inspection and in one aspect of the invention, generates a first signal if the object is left in the field of inspection for more than a minimum theshold period of time. In a second aspect a second signal is generated if the object is introduced to the field of inspection more than a minimum threshold number of times (having been withdrawn from the field of inspection in the interim) within a minimum threshold period of time.
Inventors:
GEISZLER KENNETH J
WALKER RUSSEL E
WHISTON KENNETH ALAN
KWONG JON
LINDSETH DALE
WALKER RUSSEL E
WHISTON KENNETH ALAN
KWONG JON
LINDSETH DALE
Application Number:
PCT/US2000/026995
Publication Date:
December 06, 2001
Filing Date:
September 29, 2000
Export Citation:
Assignee:
KERI SYSTEMS INC (US)
International Classes:
G06K7/00; G07C9/00; (IPC1-7): G07C9/00; G06K7/00
Domestic Patent References:
| WO1987003119A1 | 1987-05-21 |
Foreign References:
| US5268670A | 1993-12-07 | |||
| US5471203A | 1995-11-28 | |||
| US5491471A | 1996-02-13 |
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