You're right, but you're also wrong:
Inventions
Tullio Campagnolo was one of the greatest legends in bicycle component invention and manufacture. During his life Tullio Campagnolo applied for many patents, and many design registrations (some of these were not in the field of bicycles, or bicycle parts). His designs were extremely influential, and very widely copied. Several companies produced items that were nearly identical in design, but consumers preferred the original as a status symbol, and as a guarantee of quality. In 1930, he patented the cam mechanism quick-release skewer that became the standard for the industry, a design still used today. In 1933, the first quick release hubs were produced by Campagnolo. Also in 1933, he patented the sliding hub, dual seatstay rod-operated, back-pedal derailleur, ultimately known as the 'Cambio Corsa'. In 1949, he introduced the 'Gran Sport' twin-cable, parallelogram rear derailleur at the Milan trade show, the first modern derailleur.
Campagnolo was also an innovator in materials engineering for bicycle component design. In 1961, Campagnolo was the first to produce components using low-pressure magnesium casting and he used new aluminum alloys and titanium. In 1966 he patented the Campagnolo self-centering wine-bottle opener.
Source: [https://en.wikipedia.org/wiki/Tullio_Campagnolo](https://en.wikipedia.org/wiki/Tullio_Campagnolo)
Jan. 21, 2018, 9:59 a.m. - Pete Roggeman
You're right, but you're also wrong: Inventions Tullio Campagnolo was one of the greatest legends in bicycle component invention and manufacture. During his life Tullio Campagnolo applied for many patents, and many design registrations (some of these were not in the field of bicycles, or bicycle parts). His designs were extremely influential, and very widely copied. Several companies produced items that were nearly identical in design, but consumers preferred the original as a status symbol, and as a guarantee of quality. In 1930, he patented the cam mechanism quick-release skewer that became the standard for the industry, a design still used today. In 1933, the first quick release hubs were produced by Campagnolo. Also in 1933, he patented the sliding hub, dual seatstay rod-operated, back-pedal derailleur, ultimately known as the 'Cambio Corsa'. In 1949, he introduced the 'Gran Sport' twin-cable, parallelogram rear derailleur at the Milan trade show, the first modern derailleur. Campagnolo was also an innovator in materials engineering for bicycle component design. In 1961, Campagnolo was the first to produce components using low-pressure magnesium casting and he used new aluminum alloys and titanium. In 1966 he patented the Campagnolo self-centering wine-bottle opener. Source: [https://en.wikipedia.org/wiki/Tullio_Campagnolo](https://en.wikipedia.org/wiki/Tullio_Campagnolo)