Patent · 1903 · age 47

US Patent 725605: System of signaling

Kept from patents.google.com · 2 files · 438 KBCall number TES PT1903.02

Provenance

Source: patents.google.comalso en.wikisource.org
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: 25003934e58db86d079d6e68926c66d9de78e0ffc620f67283f650180f573f5bsha256 of the file (64 characters). Any change to the file changes this code.
Cite as: Nikola Tesla, US Patent 725605: System of signaling (1903). Long Keeping, call number TES PT1903.02. https://longkeeping.com/nikola-tesla/us-patent-725605-system-of-signaling/

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

#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_US725605A.html

Open reading copy 258 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_US725605A.html exact filemain	HTML	258 KB	patents.google.com	25003934e58db86d079d6e68926c66d9de78e0ffc620f67283f650180f573f5b	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_725605.html exact file	HTML	181 KB	en.wikisource.org	e8c18fc27ba06c946f62741a515d7f9a96104b5ca0462fc91066408e530e0046	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.