@patent {28213,
	title = {Spray nozzle and method for dusting freshly printed products},
	volume = {7607391},
	year = {2009},
	edition = {United States of America},
	chapter = {US},
	url = {https://patents.google.com/patent/US7607391B2/en},
	author = {Rainer Haas and Nicolas Martin and J{\"u}rgen Ehrhard and Detlev Berlingen and Claudius Haas}
}