I offer a collection of 100 historical patents of wellknown Harley-Davidson Motor Co. (Milwaukee).
They are published between 1910 and 1957 in the USA (all in english).
They are busy with motor cycle technique (design, motor, pedal, gearing, wheel, saddle ...) of this former wellknown company!
All patents are complete, that means contain the full text and all drawings (see example). You will get a professional overview about the patents of this company which you find nowhere in the world in this good quality / completeness. You can learn a lot about the technical details of old car technique.