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Tesla Elecro-Magnet Motor Patent US381968 p 1-4 Postcard

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18 pt thickness / 120 lb weight Soft white, soft eggshell texture
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Tesla Elecro-Magnet Motor Patent US381968 p 1-4 Postcard

Tesla Elecro-Magnet Motor Patent US381968 p 1-4 Postcard

A rotating magnetic field is a magnetic field which periodically changes direction. This is a key principle to the operation of alternating-current motor. In 1882, Nikola Tesla identified the concept of the rotating magnetic field. In 1888, Tesla gained U.S. Patent 381968 for his work. These are the drawings. Pages 1-4; Released under the GNU Free Documentation License.
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4.9 out of 5 stars rating15.6K Total Reviews
14242 total 5-star reviews998 total 4-star reviews197 total 3-star reviews67 total 2-star reviews111 total 1-star reviews
15,615 Reviews
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5 out of 5 stars rating
By Ray A.September 30, 2025 • Verified Purchase
Post Card, Size: Standard Postcard, Paper: Signature Matte, Envelopes: None
Very pleased with my order. All my prints were manufactured to a very high standard to my exact specifications and edited additions.
5 out of 5 stars rating
By Paul I.February 4, 2021 • Verified Purchase
Post Card, Size: Standard Postcard, Paper: Signature Matte, Envelopes: None
Creator Review
I had never seen these classic science fiction images and most of my friends have not seen them either. They are like little treasures! Amazing quality and fun to send people!
5 out of 5 stars rating
By Jennifer W.November 28, 2022 • Verified Purchase
Post Card, Size: Standard Postcard, Paper: Signature Matte, Envelopes: None
Zazzle Reviewer Program
I joined Postcrossing a few months ago and wanted postcards to represent my state well. I found them on Zazzle. I purchased numerous cards and was impressed with all of them. Excellent! The colors are beautiful. The cards have the exact look I wanted. I couldn't be happier.

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Product ID: 239381168550075252
Created on: 8/4/2014, 4:12 PM
Rating: G 
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