Non-stagnant piping system
Non-stick glass stopcock
Non-stick treatment for elastomeric slit valves
Non-turbulent shut-off valve
Non-vibrating ball check valve
Non-visible faucet handle connection
Non-wearing washer for fluid valve
Noninvasive valve monitor using alternating electromagnetic fiel
Noninvasive valve monitor using constant magnetic and/or DC elec
Nonlinear control of liquid level
Nonlinear sensor for center pivot drive control system
Nonreturn piston slide valve
Nonreturn valve for medical fluid technologies
Nonreturn valve, in particular for medical infusion appliances
Nonspill vented closure assembly for storage battery
Nonsurgical intraurethral bladder control device
Nonsymmetrical valve
Nontraumatic prosthetic valve with magnetic closure
Normally closed aspiration valve
Normally closed automatic reflux valve