Ramey & Schwaller issued U.S. Pat. No. 9,131,960 covering a safety neural injection system that includes at least a partially hollow cannula having an inside diameter, an outside diameter, a first length, a side port located coaxially along the hollow cannula for fluid communication between the inside and the outside of the hollow cannula, and an open distal end. The safety neural injection system also includes a flexible stylet with a shaped tip. The hollow cannula proximate to the distal end includes a rigid bend so as to facilitate placement of the distal end at the treatment site. http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=9131960.PN.&OS=PN/9131960&RS=PN/9131960
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