Is this a real patent?

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

An unframed print on 200 g/m² matte paper, printed in Europe. Dispatched in 2–4 working days, followed by transit. Shipping is included to Spain, Portugal, France, Germany, Italy, Netherlands, Belgium, Austria and Ireland. Tracking by email.

What if it arrives damaged?

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

PD-53 · US 1,994,488

Direct lift aircraft

Original patent print · 1935

Sikorsky's direct-lift aircraft, 1935 — the configuration that became the modern helicopter.

200 g/m² matte paper · Unframed

29 € · Shipping included · Choose size ↓

Direct lift aircraft patent drawing, 1935, archive paper finish

US 1,994,488Direct lift aircraft1935

Inventor: Igor I. Sikorsky
Patented: March 19, 1935

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Total29 €

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PD-53 · US 1,994,488 · Filed June 27, 1931 ·

Pairs well with

Full collection

Common questions

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?: An unframed print on 200 g/m² matte paper, printed in Europe. Dispatched in 2–4 working days, followed by transit. Shipping is included to Spain, Portugal, France, Germany, Italy, Netherlands, Belgium, Austria and Ireland. Tracking by email.
What if it arrives damaged?: Send a photo within 7 days and we reprint and reship it free.

Read the full FAQ

Direct lift aircraft

Pairs well with

Flying Machine

Rocket Apparatus

Parachute

Common questions