Is this a real patent?

Yes — the original drawing as filed at the U.S. Patent Office, cleaned and printed. Public domain by law.

Printed in Europe on 200 g/m² matte paper. Small sizes ship flat, 50 × 70 ships rolled in a tube. Tracking by email.

What if it arrives damaged?

Send a photo within 7 days and we reprint and reship it free.

US 2,168,726Propulsion of aircraft and gas turbines1939

PD-58 · US 2,168,726

Name: Propulsion of aircraft and gas turbines Patent Print (1939)
Brand: PATENT DEPT.
SKU: PD-58
Availability: InStock

Frank Whittle's jet engine — patented while the Air Ministry called it impractical.

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PD-58 · US 2,168,726 · Filed February 27, 1937 ·

Is this a real patent?: Yes — the original drawing as filed at the U.S. Patent Office, cleaned and printed. Public domain by law.
How is it shipped?: Printed in Europe on 200 g/m² matte paper. Small sizes ship flat, 50 × 70 ships rolled in a tube. Tracking by email.
What if it arrives damaged?: Send a photo within 7 days and we reprint and reship it free.