How Samuel Morse Patented the Electric Telegraph System
Samuel Morse's 1840 patent for the electric telegraph, which enabled long-distance communication by sending electrical pulses over wires to represent letters.
Original patent title: “Improvement in the mode of communicating information by signals by the”
Samuel Morse's 1840 patent for the electric telegraph, which enabled long-distance communication by sending electrical pulses over wires to represent letters. Granted to Samuel F. B. Morse in 1840 with 8 forward citations.
Key facts
Coverage
What does this patent actually cover?
The patent describes a system for transmitting information using electrical signals sent through a wire circuit. It uses a transmitter to break and close an electrical circuit, creating pulses that travel to a receiver. The receiver then records these pulses as marks on a moving strip of paper, allowing a human operator to translate the patterns into readable text.
The gap
What does this patent NOT cover?
- Does not cover wireless radio or electromagnetic wave transmission
- Does not cover modern digital data encoding or internet protocols
- Does not cover voice transmission or telephony
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
Morse realized that you did not need to transmit complex images or sounds; you only needed to transmit simple, distinct pulses that could be mapped to a code.
The Patent Drawing
Schematic visualization of the patent's claim structure. Hand-drawn diagrams in progress for each landmark patent.
Where you've seen this
Real-world examples
Early 19th-century telegraph lines
Morse code signaling systems
Transatlantic telegraph cables
Why it matters
The bigger picture
This patent laid the foundation for the global telecommunications industry. It transformed how information traveled, moving from the speed of a horse to the speed of electricity, and effectively created the first near-instantaneous long-distance messaging network.
Granted
June 20, 1840
Market context
Who's building on this
Companies in this space
While the original telegraph is obsolete, modern telecommunications giants like AT&T and Verizon trace their lineage back to the infrastructure and regulatory frameworks established by the telegraph era.
Market impact
This patent triggered a massive expansion in global infrastructure, leading to the creation of the first international communication standards. It effectively ended the era of physical mail as the primary method for urgent long-distance communication.
Claim 1 — Plain English
What this patent covers
The patent describes a system for transmitting information using electrical signals sent through a wire circuit. It uses a transmitter to break and close an electrical circuit, creating pulses that travel to a receiver. The receiver then records these pulses as marks on a moving strip of paper, allowing a human operator to translate the patterns into readable text.
The clever bit
Morse realized that you did not need to transmit complex images or sounds; you only needed to transmit simple, distinct pulses that could be mapped to a code.
What it does not cover
- Does not cover wireless radio or electromagnetic wave transmission
- Does not cover modern digital data encoding or internet protocols
- Does not cover voice transmission or telephony
PatentBrief Score
Impact Score
Limited data
Citation count
19/40
Early citations
Claim breadth
0/20
Narrow claimsclaimsThe numbered statements at the end of a patent that legally define what the inventor owns.Read more →
Recency
0/20
Older than 20 years
Assignee scale
0/20
Independent or smaller assigneeassigneeThe entity that owns the patent — usually the inventor's employer or a company.Read more →
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
Heuristic Value Estimate
What this patent might be worth
$7K – $22K
Midpoint $13K · expired or expiring · industry ×1.4
Heuristic only — blends forward/backward citation counts, claim scope, time remaining, litigation history, and CPC-derived industry baseline. Real valuations need a professional appraisal.
Concepts involved
Citations
Patent lineage
Cite this patent
(1840). How Samuel Morse Patented the Electric Telegraph System (U.S. Patent No. 1,647). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/1647/morse-telegraph
Auto-generated from the patent record. Double-check author order and the issue date against the official USPTO document before submitting.
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Common Questions
Frequently Asked Questions
What does How Samuel Morse Patented the Electric Telegraph System cover?
Samuel Morse's 1840 patent for the electric telegraph, which enabled long-distance communication by sending electrical pulses over wires to represent letters.
Who owns patent US 1647?
Samuel F. B. Morse owns this patent, granted in 1840.
When does this patent expire?
This patent has expired and is now in the public domain — anyone can use the invention freely.
What is patent US 1647 cited by?
This patent has been cited by 8 later patents that build on its ideas.
What problem does this patent solve?
This patent laid the foundation for the global telecommunications industry. It transformed how information traveled, moving from the speed of a horse to the speed of electricity, and effectively created the first near-instantaneous long-distance messaging network.
What does this patent NOT cover?
Does not cover wireless radio or electromagnetic wave transmission
Patent monitoring