The first hydrogen fuel cell patents appeared in the patent office during 1890's, and every decade up until the oil crisis of the 1970's birthed some hydrogen conversion patents as well.
This book is focused on Hydrogen technology that can be
applied to home, automobile and aerospace engines.
I fully endorse having hydrogen power as either a primary or secondary power system for the craft. I have released the various hydrogen conversion patents that have gone public domain here.
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