# 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.

- **Patent:** US 1647
- **Original title:** Improvement in the mode of communicating information by signals by the
- **Owner:** Samuel F. B. Morse
- **Granted:** 1840
- **Status:** Active
- **Times cited:** 8
- **Field:** telecommunications, mechanical

## What it does

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.

## 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

## 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.

## Real-world examples

1. Early 19th-century telegraph lines
2. Morse code signaling systems
3. Transatlantic telegraph cables

## Why it matters

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.

## 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

**Full plain-English explainer:** https://patentbrief.org/patent/us/1647/morse-telegraph

**Original patent:** https://patents.google.com/patent/US1647

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._


## Related patents

Semantically similar inventions in the PatentBrief corpus:

- [How Marconi Patented Early Wireless Telegraphy Signals](https://patentbrief.org/patent/us/586193/radio-wireless-marconi) — Guglielmo Marconi's 1897 patent for sending electrical signals through the air to enable early wireless communication.
- [Alexander Graham Bell's Patent for the Telephone](https://patentbrief.org/patent/us/174465/bell-telephone) — Alexander Graham Bell's 1876 patent describing the method and apparatus for transmitting vocal sounds telegraphically, effectively inventing the telephone.
- [How Pulse Code Modulation Digitizes Analog Signals](https://patentbrief.org/patent/us/2266401/pcm-pulse-code-modulation-reeves) — A foundational 1938 patent describing how to convert continuous sound waves into a stream of digital numbers for transmission.
- [Edison's First Patent: An Electric Vote Recorder](https://patentbrief.org/patent/us/90646/edison-first-patent-vote-recorder) — Thomas Edison's very first patent, granted in 1869, describes an early machine designed to use electricity to quickly record and tally votes, primarily for legislative bodies.
- [Lee De Forest's Early Radio Telegraphy System](https://patentbrief.org/patent/us/879532/de-forest-audion-vacuum-tube) — A 1908 patent by radio pioneer Lee De Forest describing methods for transmitting and receiving wireless telegraphy signals using early vacuum tube technology.