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 …
Article tracking system
J Werb, C Lanzl, K Mckinney - US Patent 6,150,921, 2000 - freepatentsonline.com
System for tracking mobile tags. Cell controllers with multiple antenna modules generate a
carrier signal which is received by the tags. Tags shift the frequency of the carrier signal …
carrier signal which is received by the tags. Tags shift the frequency of the carrier signal …