Francis Rogallo

First Patent was filed on 23rd November 1948

Granted on the 20th March 1951

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The Second Patent was filed on the

17th November 1952

Granted on the 19th June 1956

The Third Patent was filed on the

29th April 1963 and Granted on the 25th May 1965

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The Fourth Patent was filed on the

17th January 1964 and Granted on 2nd September 1969

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The Fifth Patent was filed on

17th January 1964 and was granted on 21st March 1967

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