According to the search data IP activity in RFID base supply chain applications seems to have started during the year 1991. The graph shows terrific growth from 2000 onwards and high activity during 2004 with 140 patents records alone. Around 423 patents have been published in the span of 4.2 years from 2000 till date (Feb. 2005) indicating the potential in the field.
[[Image:IP_over_year.png|576px|center |thumb IP landscape over years: Growth in RFID base supply chain applications]]