Method and apparatus combining a tracking system and a wireless communication system
J Goldinger, C Lanzl, J Werb - US Patent 6,812,824, 2004 - Google Patents
3.289, 114 3,478,344 3,706,094 3,707,711 3,740,742 3,805,265 3,914,762 3,944,928
3,964,024 3.973, 200 4,019,181 4,075,632 4,114,151 4,314,373 4,347,501 4,364.043 …
3,964,024 3.973, 200 4,019,181 4,075,632 4,114,151 4,314,373 4,347,501 4,364.043 …
Transponder arrangement
JH Schuermann, G Heinecke, R Kremer - US Patent 5,053,774, 1991 - Google Patents
A transponder arrangement is described comprising an interrogation unit (10) which sends
an RF interrogation pulse to at least one responder unit (12). The responder unit (12) then …
an RF interrogation pulse to at least one responder unit (12). The responder unit (12) then …
Article tracking system
J Werb, C Lanzl, K McKinney - US Patent 6,150,921, 2000 - Google Patents
3,707,711 12/1972 Cole et al.. System for tracking mobile tags. Cell controllers With mul
3,740,742 6/1973 Thompson et al.. tiple antenna modules generate a carrier signal Which is …
3,740,742 6/1973 Thompson et al.. tiple antenna modules generate a carrier signal Which is …
Item identification tag for rapid inventory data acquisition system
JA Ekchian, RW Hoffman, L Ekchian… - US Patent …, 1989 - Google Patents
A computerized transceiver repeatedly sweeps through a set of transmit/receive frequencies
to interrogate collectively a plurality of groups of items in a stocking area. Items in each …
to interrogate collectively a plurality of groups of items in a stocking area. Items in each …
Multi-mode identification system
ML Beigel, N Polish, RE Malm - US Patent 5,235,326, 1993 - Google Patents
The multi-mode identification system is a short-range cooperative electronic identification
system for use in the identification of fish, birds, animals, and inanimate objects. The system …
system for use in the identification of fish, birds, animals, and inanimate objects. The system …
Ultrasonic personnel location identification system
HJ Nastrom - US Patent 4,955,000, 1990 - Google Patents
BACKGROUND OF THE INVENTION 1. Field of the Invention. The present invention is an
electronic system for identifying the location of personnel within a multiple room complex. In …
electronic system for identifying the location of personnel within a multiple room complex. In …
System for identifying particular objects
AR Koelle, JA Landt - US Patent 4,739,328, 1988 - Google Patents
US4739328A - System for identifying particular objects - Google Patents US4739328A -
System for identifying particular objects - Google Patents System for identifying particular …
System for identifying particular objects - Google Patents System for identifying particular …
Electronic surveillance and identification
WR Holland - US Patent 4,746,830, 1988 - Google Patents
BACKGROUND ART The electronic article surveillance (“EAS”) industry has been evolving
for several decades in attempts to deter and detect pilferage and shoplifting in libraries …
for several decades in attempts to deter and detect pilferage and shoplifting in libraries …
Article tracking system
J Werb - US Patent 6,483,427, 2002 - Google Patents
3,273,146 A 9/1966 Hurwitz, Jr.... 343/6.8 tance of a tag from an antenna is calculated by
measuring the 3.289, 114 A 11/1966 Rowen........................ 333/30 round trip signal time. The …
measuring the 3.289, 114 A 11/1966 Rowen........................ 333/30 round trip signal time. The …
Backscatter communication systems, interrogators, methods of communicating in a backscatter system, and backscatter communication methods
R Greeff, DK Ovard - US Patent 6,192,222, 2001 - Google Patents
The present invention includes backscatter communication systems, interrogators, methods
of communicating in a backscatter system, and backscatter communication methods …
of communicating in a backscatter system, and backscatter communication methods …