Offer Valid: 1/1/13 - 6/30/13 Buy 4 boxes of Accuject Plastic Hub Needles, Get 1 Free! To receive free goods, mail a copy of your Patterson invoice to: Dentsply Professional, 1301 Smile Way, York, PA 17404 or fax to 1-800-278-4344. Offers must be redeemed by 7/31/13. Limit 5 redemptions of each offer per doctor. These offers may not be combined with any other Dentsply offers or contract agreements. Must be on once invoice.