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Patent · 1889 · age 33

US Patent 417794: Armature For Electrlc Machines

by Nikola Tesla

Kept from patents.google.com · 1 file · 62 KBCall number TES PT1889.13

Provenance

Source
patents.google.com
Retrieved
1 October 2026
Source terms (summary)
Google terms: automated access against robots.txt counts as abuse
Rights
Public domainPatent text by Tesla, who died in 1943.Basis: author death year 1943, under a life-plus-70-years rule, as of 2026; other rules, such as the United States publication-date rules, are not assessed.
Formats
HTML
Fingerprint
40fde769a296e40cfe67051b6f5168bd1eacd87da72883e99d94aaa5f2b6e06dsha256 of the file (64 characters). Any change to the file changes this code.
Cite as
Nikola Tesla, US Patent 417794: Armature For Electrlc Machines (1889). Long Keeping, call number TES PT1889.13. https://longkeeping.com/nikola-tesla/us-patent-417794-armature-for-electrlc-machines/
Unchanged since collected At the last check, on 2 October 2026, all 903 originals, this work's file among them, matched the fingerprints recorded when they were collected. Each copy is re-checked by hand once a year; there is no automatic alert yet.

Notes on this copy

  • #2Machine-read text (OCR), not proofread, with no page images in the file to check it against.

Original

googlepatents_US417794A.html

Open reading copy 62 KBExact filePublic domain

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Files

First pass, not a clearance.

Links inside these saved pages were written for the site they were saved from; some lead nowhere here.

FileFormatSizeSourcesha256Label
googlepatents_US417794A.html exact filemain HTML 62 KB patents.google.com 40fde769a296e40cfe67051b6f5168bd1eacd87da72883e99d94aaa5f2b6e06d Public domainPatent text by Tesla, who died in 1943.Basis: author death year 1943, under a life-plus-70-years rule, as of 2026; other rules, such as the United States publication-date rules, are not assessed.