Equilibar® back pressure regulators are subject to one or more of the following patents:

Multi-Orifice Back Pressure Regulators (including but not limited to the following series: LF, LV, HxP, HT, GS, NL, B, BD, FD, SC, BR):
US6,886,591
US7,080,660
US7,673,650
US8,215,336
DE60322443D1
GB1639282
FR1639282
CH1639282

Zero Flow (ZF Series) Back Pressure Regulators:
US9,447,890

Other Patents Pending

Equilibar® is a registered US trademark.