Patent einer Scheibenbremse für Fahrräder - Patent Nr. US526317
Joel H. Hendrick &amp; Arthur H. Fay
<a rel="nofollow" class="external free" href="https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&amp;NR=526317A&amp;KC=A&amp;FT=D&amp;ND=&amp;date=18940918&amp;DB=&amp;locale=de_EP">https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=US&amp;NR=526317A&amp;KC=A&amp;FT=D&amp;ND=&amp;date=18940918&amp;DB=&amp;locale=de_EP</a>