Clarence Ernest Holt

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Clarence Ernest Holt of Ada, Oklahoma, patented ornithopter designs.

Patents whose inventor or applicant is Clarence Ernest Holt

Patent US-1921-1370445 (English title: Flying machine, Filing date: 1918-08-23)
Patent US-1921-1371204 (English title: Air-engine for flying-machines, Filing date: 1918-12-30)

References

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Inventors