@misc{SpeitDoehringWolff2013, author = {Burkard Speit and Thorsten D{\"o}hring and Silke Wolff}, title = {Lead-containing space glass, its production and use}, url = {http://worldwide.espacenet.com/publicationDetails/biblio?CC=US\&NR=8431500B2\&KC=B2\&FT=D\&ND=4\&date=20130430\&DB=EPODOC\&locale=en_EP}, type = {patent}, year = {2013}, }