Charles S. Hall Airplanes

Hi,

Mr. Charles S. Hall was involved in a VTOL aircraft with Chris Matthews;
http://www.secretprojects.co.uk/forum/index.php/topic,22359.0.html

he invented a number of airplane patents,here it's;

https://www.google.com/patents/US1667002?dq=charles+S.+Hall+Aircraft&hl=ar&sa=X&ved=0ahUKEwjl4_O1hLHLAhUK5xoKHWmqBJ44ChDrAQhtMAk
https://www.google.com/patents/US1471656?dq=charles+S.+Hall+Aircraft&hl=ar&sa=X&ved=0ahUKEwjOxI_CgrHLAhXGMhoKHc9tCdkQ6wEIHzAA
https://www.google.com/patents/US1687203?dq=charles+S.+Hall+Aircraft&hl=ar&sa=X&ved=0ahUKEwjOxI_CgrHLAhXGMhoKHc9tCdkQ6wEIKDAB
https://www.google.com/patents/US1686130?dq=charles+S.+Hall+Aircraft&hl=ar&sa=X&ved=0ahUKEwjOxI_CgrHLAhXGMhoKHc9tCdkQ6AEIMDAC
https://www.google.com/patents/US1449100?dq=charles+S.+Hall+Aircraft&hl=ar&sa=X&ved=0ahUKEwjOxI_CgrHLAhXGMhoKHc9tCdkQ6wEIOjAD
https://www.google.com/patents/US1449099?dq=charles+S.+Hall+Aircraft&hl=ar&sa=X&ved=0ahUKEwjOxI_CgrHLAhXGMhoKHc9tCdkQ6wEITDAF