DISRAELI DOCUMENTS
This 1971 patent struggles to fill an A4 page with content - a refreshing change from modern patents that often run to dozens of pages of questionable relevance or originality.
Despite its brevity, it does manage to show a drawing of what is unquestionably the distinctive pulley cage design of the Favorit Special. This is important to derailleur geeks because it provides a date for this design (1971) and identifies the designers (Otto Šaman and Vlastimil Anténe).
