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
~~~~~~ Arturo Serri
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)
Cenna
DABEG steamengine
~~~~~~ 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
Hider, P.L.
~~~~~~ Howarth
Küchen, Richard see: Neander
~~~~~~ Mangoletsi
~~~~~~ Maserati 6 cil.
~~~~~~ Maserati V8.
~~~~~~ Miller
~~~~~~ Mondial
~~~~~~ Morini
Moto Guzzi (Hans Peter Länge)
~~~~~~ MV Agusta 125 cc desmo double knocker
~~~~~~ Nagant
Nash, Lewis
~~~~~~ Norton 350 (Bryan Thomas)
~~~~~~ Schönenberg (Norton)Schönenberg 4-valve Norton see: Schönenberg
~~~~~~ NSU (Ultramax) (Willi Hartung)
~~~~~~ Peeren, Frits & Cees Fick
~~~~~~ Pegaso (Ricart) Pegaso
Pohn, Franz : see BMW
Prestwich, John Alfred see: JAP
~~~~~~ Rolland-Pilain
~~~~~~ Scarab (Reventlow)
~~~~~~ Schönenberg (Norton)
~~~~~~ Treen 350 cc research engine
Doubtful (crank)cases:
~~~~~~ AWO/Simpson
~~~~~~ Bianchi (Lino Tonti)
Semi-Desmodromic Systems:
~~~~~~ Lito
~~~~~~ Zedel (Zürcher Lüthi)