Patented systems

This list of produced systems mentions (with hyperlinks to their own information pages) the patented systems.
N.B. The non-patented systems are driven to the right by ~~~~~~!!

~~~~~~Ariel (Ron Gardner)

~~~~~~Aries

Arnott (JAP)

~~~~~~Arturo Serri

Azzariti (Benelli)

Ballot

Battlogg, Stefan

Bignan (Causan)

BMG see: Velocette

~~~~~~BMW 2-valve (Franz Pohn)
~~~~~~BMW 4-valve (Franz Pohn)
~~~~~~BMW R1
~~~~~~BRM (British Racing Motors)

~~~~~~Capriolo (system à la R. Küchen)

Caprotti
Cenna (Ducati)

Cosworth

DABEGsteamengine

Daimler

~~~~~~Delage GP

DUCATI
. Whole factory line 1956- present time
.. Ducati 125 GP-triple nocker
.. ~~~~~~Ducati 1 cil. production desmo’s(1968 –
.. ~~~~~~Ducati 250-GP-Twin
.. ~~~~~~Ducati paralleltwins
.. ~~~~~~Ducati Bevel-gear L-twins
.. ~~~~~~Ducati Pantah-line
.. Ducati Four-valve L-twins
.. Ducati air-cooled new generation 2 & 3 Valve
.. ~~~~~~Ducati Del Biondo 4valve desmo 1cil.
.. ~~~~~~Ducati Mazzucato, Carlo(speedway)

~~~~~~Duesenberg

E.S.O.

~~~~~~Ferrari F1 GP

Fiat 401 in tipo 801

Hider, P.L.

Horak

~~~~~~Howarth

JAP

Küchen, Richard see: Neander

Lantenhammer/Sedlbauer

Lau Foo Wah

~~~~~~Mangoletsi

~~~~~~Maserati 6 cil.

~~~~~~Maserati V8.

Mercedes-Benz (W-196)

~~~~~~Miller

~~~~~~Mondial

~~~~~~Morini

Moto Guzzi (Hans Peter Länge)

~~~~~~MV Agusta 125 cc desmo double knocker

~~~~~~Nagant
Nash, Lewis

Neander (system Küchen)

Norton Manx (Joe Craig)

~~~~~~Norton 350 (Bryan Thomas)

~~~~~~Schönenberg (Norton)Schönenberg 4-valve Norton see: Schönenberg

~~~~~~NSU (Ultramax) (Willi Hartung)

OSCA (Maserati 372 DS)

~~~~~~Peeren, Frits & Cees Fick

~~~~~~Pegaso (Ricart) Pegaso

Pohn, Franz : see BMW

Porsche 753 GP

Prestwich, John Alfred see: JAP

~~~~~~Rolland-Pilain

Salmson

~~~~~~Scarab (Reventlow)

Schneider (system Michaux)

~~~~~~Schönenberg (Norton)

~~~~~~Treen 350 cc research engine

Vagova (Vareille)

Velocette (patented by BMG)

Doubtful (crank)cases:

~~~~~~AWO/Simpson

~~~~~~Bianchi (Lino Tonti)

Honda GP

Pa Norton’s patented system

Semi-Desmodromic Systems:

~~~~~~Lito

Muller, Jan

~~~~~~Peugeot L76

~~~~~~Zedel (Zürcher Lüthi)