1
Glenn G Havens, Thomas F McGee: Thin wall irrigation emitter tube. Bayshore Creative Products, Brown & Martin, March 10, 1981: US04254916 (9 worldwide citation)

A thin wall irrigation emitter tube is constructed of a generally flat configuration having a plurality of holes in a crease extending along the top of the tubing for distribution from the tubing in vertical spray or streams. The method of forming the tubing includes the forming of a rib or crease a ...


2
Glenn G Havens: Pressure compensating emitter. Bayshore Creative Products, Brown & Martin, March 18, 1980: US04193545 (7 worldwide citation)

A pressure compensating emitter comprises a generally cylindrical body member having a longitudinal passageway therethrough connecting an inward port and an outward port and a flexible pressure responsive boot mounted within the passageway for responding to increases in pressure within the boot or c ...