Patents, in plain English

The clearest place on the internet to understand patents.

Name: PatentBrief
Address: Phoenix, AZ, US
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Plain-English summaries and claim breakdowns of landmark US patents — built in Phoenix, Arizona for inventors, founders, and engineers anywhere.

Try: "touchscreen bounce effect" · "noise-cancelling headphones" · "AI content moderation"

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What they really cover. What they don't. Why they matter — without the legalese. For engineers, founders, and curious humans.

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55patents explained

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49glossary terms

Patent of the Day

May 28, 2026

Featured·US 3671542

Kevlar — The Fiber Five Times Stronger Than Steel, Invented by Accident

Stephanie Kwolek's 1965 DuPont patent describes Kevlar — the aramid fiber that is five times stronger than steel by weight, discovered when Kwolek insisted on testing a strange cloudy polymer solution her colleagues thought was defective.

EI Du Pont de Nemours and Co·1972materials-sciencedefense

Landmark Patents

Famous inventions, properly explained.

US 12564871 · 2026 · ASM IP HOLDING BV

A Fixture for Cleaning Showerheads with Multiple Separate Chambers

US 12324579 · 2025 · CILAG GMBH INT

Surgical Stapler Battery Health Check During Operation

US 12471982 · 2025 · CILAG GMBH INT

Surgical Tool That Combines Energy Treatment and Stapling

US 11918209 · 2024 · CILAG GMBH INT

Real-Time Surgical Instrument Status on Live Video During Operations

US 8697359 · 2014 · Massachusetts Institute of Technology

How to Use CRISPR-Cas9 to Edit Genes in Human Cells

US 4683195 · 1987 · Cetus Corp

How to Make Many Copies of a Specific DNA Segment

US 7657849 · 2010 · Apple Inc

How the iPhone's Slide-to-Unlock Gesture Worked

US 4405829 · 1983 · Massachusetts Institute of Technology

How RSA Public-Key Encryption Secures Digital Messages

US 7479949 · 2009 · Apple Inc

How Touchscreens Tell the Difference Between Your Finger Gestures

US 5347632 · 1994 · Prodigy Services Co

How Early Online Services Delivered Applications Using Networked 'Objects'

US 10452978 · 2019 · Google LLC

How AI Models Understand Language Using Self-Attention

US 6285999 · 2001 · Leland Stanford Junior University

How Websites Get Ranked by Who Links to Them

US 7469381 · 2008 · Apple Inc

How Touchscreens Make Documents Bounce When You Scroll Too Far

US 5960411 · 1999 · Amazon com Inc

How Amazon's One-Click Online Ordering System Works

US 4063220 · 1977 · Xerox Corp

How Computers Share a Network Cable Without Crashing

US 4200770 · 1980 · Leland Stanford Junior University

The Math That Makes Every HTTPS Connection Secure

US 5825352 · 1998 · Logitech Inc

How Touchpads Detect Two Fingers for Clicks and Drags

US 4558302 · 1985 · Sperry Corp

How Computers Shrink Data by Finding Repeated Patterns

US 5487069 · 1996 · Commonwealth Scientific and Industrial Research Organization CSIRO

The WiFi Patent — How an Australian Government Lab Made Wireless Work Indoors

US 4009052 · 1977 · Exxon Research and Engineering Co

The First Rechargeable Lithium Battery — Built at an Oil Company

US 4237224 · 1980 · Leland Stanford Junior University

How to Make Hybrid DNA and Grow It in Microbes

US 6266649 · 2001 · Amazon com Inc

Amazon's 'Customers Also Bought' — The Recommendation Algorithm That Changed Retail

US 4736866 · 1988 · Harvard University

OncoMouse — The First Patented Animal, Built to Get Cancer

US 4723129 · 1988 · Canon Inc

Inkjet Printing — How a Hot Wire Discovered the Bubble Jet

US 3789832 · 1974

MRI — The Imaging Machine That Detects Cancer Without Radiation

US 5774670 · 1998 · Netscape Communications Corp

The HTTP Cookie — How Websites Remember Who You Are

US 6370526 · 2002 · International Business Machines Corp

Google AdWords — The Auction System That Made Search Profitable

US 4166152 · 1979 · Minnesota Mining and Manufacturing Co

The Post-it Note Adhesive — Invented as a Failure That Stuck Around

US 8448084 · 2013 · Twitter Inc

Pull Down to Refresh — The Gesture in Every Mobile App

US 5191573 · 1993

How to Buy and Download Digital Music or Movies Over a Phone Line

US 4302518 · 1981

The Battery Cathode That Powers Every Electric Vehicle and Smartphone

US 2130948 · 1938 · EI Du Pont de Nemours and Co

Nylon — The First Synthetic Fiber, Invented at DuPont

US 2981877 · 1961 · Fairchild Semiconductor Corp

The IC Manufacturing Method That Made Silicon Valley Possible

US 2569347 · 1951 · Bell Telephone Laboratories Inc

The Transistor — The Invention That Made the Digital Age Possible

US 5838906 · 1998 · University of California San Diego UCSD

Microsoft's Browser Patent — At the Center of the Biggest Antitrust Case in Tech

US 3387286 · 1968 · International Business Machines Corp

DRAM — The Memory in Every Computer, Phone, and Server

US 3541541 · 1970 · Stanford Research Institute

The Computer Mouse — Invented 30 Years Before Anyone Cared

US 2717437 · 1955 · Velcro SA

Velcro — The Hook-and-Loop Fastener Inspired by a Burr

US 3671542 · 1972 · EI Du Pont de Nemours and Co

Kevlar — The Fiber Five Times Stronger Than Steel, Invented by Accident

US 4136359 · 1979 · Apple Computer Inc

The Apple II — The First Personal Computer That Came With Color

US 3005282 · 1961 · Interlego AG

How LEGO Bricks Connect and Stay Together

US 2292387 · 1942

Hedy Lamarr's Secret Radio System for Torpedo Guidance

US 223898 · 1880

Edison's First Practical Electric Light Bulb

US 2612994 · 1952

The Barcode — The Lines on Every Product in Every Store

US 4531203 · 1985 · Tokyo Shibaura Electric Co Ltd

NAND Flash — The Memory in Every SSD, iPhone, and USB Drive

US 3138743 · 1964 · Texas Instruments Inc

The Integrated Circuit — Putting the Whole Transistor Radio on One Chip

US 821393 · 1906

How the Wright Brothers' First Flying Machine Controlled Flight

US 2780765 · 1957 · Bell Telephone Laboratories Inc

The First Solar Cell That Could Actually Power Something

US 3789410 · 1974 · US Department of Navy

Measuring Distance to a Radio Emitter from a Moving Vehicle

US 174465 · 1876

Bell's 1876 Patent for Sending Voice Over Wires

US 2495429 · 1950 · Raytheon Manufacturing Co

The Microwave Oven — Invented When a Radar Engineer Melted a Chocolate Bar

US 1773980 · 1930 · TELEVISION LAB Inc

Electronic Television — Invented at 21 by a Farm Boy Who Drew It in a Potato Field

US 1219881 · 1917 · Hookless Fastener Co

The Zipper — The Fastener That Replaced a Thousand Buttons

US 382280 · 1888

Tesla's AC Induction Motor: How Alternating Current Powers the World

US TEST001 · Apple Inc

How Apple Detects Hand Gestures in Spatial Computing

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Where legal language becomes clear

Plain‑English summary

Every patent distilled into one sentence and a full plain-English explanation — no legal training required.

What it covers

We map the actual claim boundaries: exactly which implementations are protected and which aren't.

What it doesn't cover

The part every other site skips. The edges of protection matter as much as the protection itself.

FAQ

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What is PatentBrief?

PatentBrief is a free tool that explains US patents in plain English — no law degree required. We break down what each patent actually covers, what it doesn't cover, and why it matters.

Is PatentBrief free?

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Our database includes patents from the 1970s through recent grants. New patents are added regularly as they're granted by the USPTO.

Can I use PatentBrief for legal advice?

No. PatentBrief is an educational tool, not a law firm. Our explanations help you understand patents, but they don't constitute legal advice. Consult a registered patent attorney for legal guidance.

What does 'what a patent does NOT cover' mean?

Every patent has gaps — things the inventor didn't claim, or claimed too narrowly. PatentBrief highlights these gaps so engineers and founders know exactly what they can and can't build without infringing.

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