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 1,707,570Loud-speaker1929

PD-48 · US 1,707,570

Name: Loud-speaker Patent Print (1929)
Brand: PATENT DEPT.
SKU: PD-48
Availability: InStock

Rice and Kellogg's moving-coil loudspeaker — the 1929 design still inside almost every speaker made.

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Size

Total29 €

Shipping included (EU)

PD-48 · US 1,707,570 · Filed April 20, 1925 ·

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.