The true inventors of the 'sailplane'

[richard]

In 1923 ,two men had paid a lot to protect their rights on this invention .

 

[airman]

Sailplane !? ;D ;D ;D ;D ;D ;D ;D
Sincerely i am happy for them if this invention remained @ state of project !

 

[Jemiba]

Ok, I must admit, there were other examples of aircraft with sails,
as shown on http://www.histaviation.com/Ro_II_serie_3_sailing.jpg.
But I think, this patent means something different !