Patent · 1900 · age 44

US Patent 645576: System of transmission of electrical energy

Kept from patents.google.com · 3 files · 1.7 MBCall number TES PT1900.01

Provenance

Source: patents.google.comalso en.wikisource.org, patentimages.storage.googleapis.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, PDF scan
Fingerprint: 49fe85c1abf83414c548fa4ecbded5ed362b544cd9dce7b36c4555cc8aa4d740sha256 of the file (64 characters). Any change to the file changes this code.
Cite as: Nikola Tesla, US Patent 645576: System of transmission of electrical energy (1900). Long Keeping, call number TES PT1900.01. https://longkeeping.com/nikola-tesla/us-patent-645576-system-of-transmission-of-electrical-energy/

Unchanged since collected At the last check, on 2 October 2026, all 903 originals, this work's 3 files 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

#1The file carries images, and no check is recorded yet that none of them is a picture of the person (the collection keeps no likenesses).
#2Machine-read text (OCR), not proofread, with no page images in the file to check it against.
#9Saved from Wikisource without a pinned revision number; the revision is recorded inside the file itself.

Original

googlepatents_US645576A.html

Open reading copy 568 KB Exact filePublic domain

Reading copy: the saved page with its pictures left out. A picture appears in the reading copy only once the library has recorded its licence, the licence is on the library's pass list, and it has been checked for a likeness. See its pictures at the source (another site). Exact file: the page byte for byte; its pictures do not load here.

Files

First pass, not a clearance.

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

File	Format	Size	Source	sha256	Label
googlepatents_US645576A.html exact filemain	HTML	568 KB	patents.google.com	49fe85c1abf83414c548fa4ecbded5ed362b544cd9dce7b36c4555cc8aa4d740	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.
wikisource_United_States_patent_645576.html exact file	HTML	164 KB	en.wikisource.org	a1dd8ce7a894248d724a6f1143de311db09f309abaa830f98dd1c34f3d1227ff	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.Licence: CC BY-SA 4.0 (another site). Attribution: Wikisource contributors (another site).This is Wikisource's licence for its own contributions to this saved page, such as layout and notes. The work's text is labelled public domain, as this file's label shows.
googlepatents_US645576A_scan.pdf	PDF scan	976 KB	patentimages.storage.googleapis.com	e383f51a5278b4a0e7c365030df569a723b8c9de59ae29828ccbba2c03d400a8	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.Held in the archive: its images await the archive's likeness review. Its source (another site)