@misc{SponagelWachowitz2007,
  author    = {Stefan Sponagel and Waldemar Wachowitz},
  title     = {Shaft seal : United States Patent 5,143,385 ; date of patent: Sep. 1, 1992 / assignee: Firma Carl Freudenberg},
  institution = {Fachbereich Medizintechnik und Technomathematik},
  type      = {patent},
  pages     = {5 S. : Ill.},
  year        = {2007},
}