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Patent

US1390258 Stepped lenticular system for heat and light concentrating to be used on flying-machines

Cited prior art · Geneste Philippe · United States · 1921

CATION FLED JUNE 8, 1920. 1,390,258. Patented Sept. 6, 1921. PHILIPPE (ENESTE Page 2 Drawing sheet — no readable text. Page 3 UNITED STATES PATENT OFFICE. PHILIPPE