U.S. Patent 174465 (Improvement in Telegraphy)

E44557

U.S. Patent 174465 (Improvement in Telegraphy) is Alexander Graham Bell’s landmark patent that laid the legal and technical foundation for the invention and development of the telephone.

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Generate an image of U.S. Patent 174465 (Improvement in Telegraphy) (U.S. Patent 174465 (Improvement in Telegraphy) is Alexander Graham Bell’s landmark patent that laid the legal and technical foundation for the invention and development of the telephone.)

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Statements (47)

Predicate Object
instanceOf United States patent ⓘ
telecommunications patent ⓘ
assignee Alexander Graham Bell ⓘ
associatedOrganization AT&T ⓘ
American Bell Telephone Company ⓘ
Bell Telephone Company ⓘ
associatedPerson Alexander Graham Bell ⓘ
associatedWithInvention electrical transmission of articulate speech ⓘ
invention of the telephone ⓘ
category 19th-century patent ⓘ
telecommunications law precedent ⓘ
citedAs Bell’s basic telephone patent ⓘ
claims apparatus for producing electrical undulations corresponding to sound vibrations ⓘ
method of transmitting vocal sounds telegraphically by causing electrical undulations similar in form to the vibrations of the air accompanying the said vocal sounds ⓘ
use of variable resistance to create electrical undulations for sound transmission ⓘ
country United States ⓘ
describes receiver for converting electrical undulations back into audible sound ⓘ
transmitter for converting sound vibrations into electrical signals ⓘ
use of a diaphragm in contact with an electrical circuit element ⓘ
use of undulatory (continuous) currents instead of intermittent currents for sound transmission ⓘ
enables practical long-distance voice communication over wires ⓘ
field telegraphy ⓘ
telephony ⓘ
historicalSignificance considered one of the most valuable patents in history ⓘ
laid legal and technical foundation for commercial telephony ⓘ
impact established priority for Bell in the invention of the telephone in U.S. law ⓘ
formed basis for extensive patent infringement suits in the telephone industry ⓘ
influenced development of commercial telephone networks ⓘ
subsequent telephone transmitter and receiver designs ⓘ
inventionType improvement in telegraph systems to carry complex sounds ⓘ
inventor Alexander Graham Bell ⓘ
jurisdiction United States Patent Office ⓘ
language English ⓘ
legalSignificance foundational patent for the telephone ⓘ
key patent in early telephone litigation ⓘ
patentNumber 174,465 ⓘ
relatedConcept analog signal transmission ⓘ
harmonic telegraphy ⓘ
variable resistance transmitter ⓘ
relatesTo harmonic telegraph ⓘ
telephone ⓘ
transmission of vocal or other sounds telegraphically ⓘ
subjectMatter electrical undulations corresponding to sound vibrations ⓘ
simultaneous transmission of multiple signals over a single wire ⓘ
technologyDomain electrical communication ⓘ
voice transmission ⓘ
title Improvement in Telegraphy ⓘ

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Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Alexander Graham Bell → notableWork → U.S. Patent 174465 (Improvement in Telegraphy) ⓘ
U.S. Patent 174465 → title → Improvement in Telegraphy ⓘ
linked to: U.S. Patent 174465 (Improvement in Telegraphy)