Editorial
10 Patent Milestones That Changed History
Ten moments when a patent filing changed everything — what was claimed, why it mattered, and what the world looked like after.
- #11876
The Telephone
US 174,465 · Alexander Graham Bell
What was claimed
A method and apparatus for transmitting vocal sounds over a wire as electrical undulations.
Why it was granted
Bell filed hours before Elisha Gray on February 14, 1876. The patent was granted on March 7 — and immediately became the most litigated patent in US history at the time. Over 600 lawsuits followed.
What changed after
Bell's patent gave him a 17-year monopoly on telephone technology. Western Union's refusal to buy the patent for $100,000 became one of the most regretted decisions in business history. AT&T — built directly on this patent — dominated American telecommunications for over a century.
- #21879
The Incandescent Light Bulb
US 223,898 · Thomas Edison
What was claimed
A carbon-filament lamp that could burn for hundreds of hours, making electric light commercially practical for the first time.
Why it was granted
Edison's genius wasn't the concept of electric light — others had built arc lamps. It was making it last long enough to be commercially viable. The patent covered the specific carbon-filament design that achieved this.
What changed after
Edison used this patent as the foundation for General Electric and the first electrical utility network. The patent expired in 1897, unleashing a flood of competing bulb manufacturers and dramatically accelerating electrification.
- #31906
The Wright Brothers' Flying Machine
US 821,393 · Orville & Wilbur Wright
What was claimed
A three-axis control system — using wing-warping and a movable rudder — for stable, steerable powered flight.
Why it was granted
The Wrights didn't patent the airplane. They patented the CONTROL system — the insight that the real problem of flight was control, not propulsion. Their claim was intentionally broad enough to cover any three-axis aircraft control method.
What changed after
The Wright patent caused one of aviation history's most damaging disputes. The Wrights sued nearly every US aircraft manufacturer. The resulting gridlock slowed American aviation for over a decade while European competitors surged ahead. The US government eventually forced a cross-licensing agreement in 1917 to enable wartime aircraft production.
- #41937
Nylon
US 2,130,523 · Wallace Carothers (DuPont)
What was claimed
Linear polyamide fibers — synthetic polymers that could be spun into strong, flexible filaments.
Why it was granted
Carothers systematically explored polymer chemistry until he found a reaction that produced fibers stronger than silk. DuPont's patent covered the process and the resulting polyamide structure — the basis for nylon 6,6.
What changed after
Nylon replaced silk stockings overnight and proved that synthetic materials could outperform natural ones. DuPont's patent created an entirely new category — synthetic textiles — and proved that corporate research labs could generate fundamental scientific innovations, not just incremental improvements.
- #51947
The Transistor
US 2,569,347 · Bardeen, Brattain & Shockley (Bell Labs)
What was claimed
A semiconductor device — a point-contact amplifier — that could amplify electrical signals without tubes, heat, or fragility.
Why it was granted
Bell Labs filed seven related transistor patents in 1948. The transistor replaced vacuum tubes across every category of electronics: radio, computing, telephony, navigation, consumer devices.
What changed after
The transistor is the foundational component of all modern electronics. Every microchip, every smartphone, every computer contains billions of transistor-descended devices. Bell Labs' decision to license the transistor broadly (for $25,000) rather than monopolize it was one of the most consequential technology-transfer decisions ever made.
- #61960
The Laser
US 2,929,922 · Arthur Schawlow & Charles Townes (Bell Labs)
What was claimed
A device for producing coherent light — electromagnetic radiation amplified by stimulated emission — at optical wavelengths.
Why it was granted
Townes and Schawlow described the optical maser (later renamed laser) in 1958. The patent covered the fundamental principle: using stimulated emission to amplify light at a specific wavelength.
What changed after
Lasers are now in every CD/DVD drive, barcode scanner, fiber-optic cable, surgical suite, and manufacturing line. The patent sparked one of the longest patent priority disputes in history — between Bell Labs and inventor Gordon Gould — that lasted 28 years.
- #71976
Recombinant DNA
US 4,237,224 · Stanley Cohen & Herbert Boyer (Stanford / UCSF)
What was claimed
A method for creating biologically functional molecular chimeras — inserting foreign DNA into bacteria so the bacteria express the foreign gene.
Why it was granted
Cohen and Boyer proved you could cut DNA from different organisms and splice them together in a living cell. Stanford's decision to file a patent on fundamental science (rather than publish it freely) was itself controversial — but ultimately created the model for biotech IP.
What changed after
This single patent generated $255 million in licensing revenue for Stanford over 17 years and was licensed to 468 companies. It created the entire biotechnology industry: Genentech, Amgen, Biogen, and hundreds of others were built directly on Cohen-Boyer-licensed technology.
- #81983
RSA Encryption
US 4,405,829 · Rivest, Shamir & Adleman (MIT)
What was claimed
A cryptographic communications system based on the mathematical difficulty of factoring the product of two large prime numbers.
Why it was granted
RSA was the first practical public-key cryptosystem — where a public key encrypts and a private key decrypts. It solved the key-distribution problem that made secure communication over open networks previously impossible.
What changed after
RSA is the foundation of HTTPS, SSL/TLS, digital signatures, and nearly all public-key infrastructure. The patent expired in 2000, immediately making RSA freely available. Two weeks before expiration, RSA Security released it into the public domain — a rare deliberate early expiration.
- #91998
PageRank
US 6,285,999 · Lawrence Page (Stanford)
What was claimed
A method for scoring web documents based on the structure of links pointing to them — a document linked to by high-scoring documents scores higher.
Why it was granted
PageRank transformed web search from keyword-counting (easily gamed) to link-analysis (based on what people actually recommended). Stanford owned the patent and licensed it to Google for 1.8 million shares.
What changed after
Stanford sold those shares for approximately $336 million. Google built a trillion-dollar company on the PageRank foundation. The patent expired in 2018 — but by then, Google had built enough derivative advantages that competitors couldn't simply copy the algorithm.
- #102012
CRISPR Gene Editing
US 8,697,359 · Feng Zhang (Broad Institute / MIT)
What was claimed
A method for using the CRISPR-Cas9 system to edit genes in eukaryotic cells — including human cells — with precision.
Why it was granted
CRISPR-Cas9 made gene editing precise, affordable, and accessible. Earlier methods (zinc finger nucleases, TALENs) worked but cost thousands of dollars per experiment. CRISPR reduced that to tens of dollars.
What changed after
CRISPR is being used to develop treatments for sickle cell disease, cancer, and blindness. The Broad Institute patent (held by Zhang) is in a long-running dispute with UC Berkeley (Jennifer Doudna and Emmanuelle Charpentier). The 2020 Nobel Prize went to Doudna and Charpentier for CRISPR — but the commercially dominant patent belongs to Zhang.