1. US Patent no 4996938 titled ‘Apparatus for Propelling a User in an Underwater Environment’.
2. ‘Method and Means for Creating Anti-gravity Illusion’ US Patent no. 5255452
3. https://gigaom.com/2012/06/08/famous-judge-spikes-apple-google-case-calls-patent-system-dysfunctional/
4. US Patent Application Publication no. 20040161257