US Patent 8001977 - Moving magnetic nanoparticles through tissue

http://www.freepatentsonline.com/8001977.html

This patent from NanoBioMagnetics Inc. teaches how a pulsating magnetic field can improve the permeation of magnetic particles through living tissue or membrane which can be useful for the delivery of anti-cancer drugs. Claim 1 reads:

1. A method of using a magnetic field to move magnetically responsive nanoparticles through a membrane within a body comprising the following step:

moving the nanoparticles through the membrane using a primary magnet to direct the nanoparticles in a primary direction, and at the same time, one or more secondary magnets directed at an acute angle relative to the primary direction, wherein the secondary magnets are controlled to repetitively vary the direction of the resultant magnetic field gradient in a pulsating manner.