2026-05-23
On a Saturday night in November 1957, a Columbia University graduate student named Gordon Gould sat down with a notebook and, in a frantic burst of writing, sketched out a device he called a LASER — "Light Amplification by Stimulated Emission of Radiation." He coined the word that night. He drew the optical cavity, the mirrors, the gain medium. He described how to pump it with a flash lamp and what it could do: cutting, welding, communications, distance measurement, even thermonuclear fusion.
Worried his idea would be stolen, Gould walked the notebook to a candy store in the Bronx that happened to house a notary, and had every page stamped and dated. That notebook would become one of the most valuable pieces of paper in 20th-century engineering — and the centerpiece of a 30-year legal war.
Gould made one fatal mistake: he believed he had to build a working prototype before filing a patent. By the time he filed his application on April 6, 1959, Charles Townes and Arthur Schawlow at Bell Labs had already filed theirs (July 1958, granted as US Patent 2,929,922 in March 1960). The Patent Office sided with Bell. Theodore Maiman built the first working laser in May 1960. Gould got nothing.
What followed was one of the most extraordinary patent battles in history. Gould — who had been denied security clearance during the McCarthy era because of brief Marxist study-group attendance, which barred him from his own classified Defense Department laser project — refused to quit. He partnered with a small patent law firm, Refac Technology, which agreed to fund the litigation in exchange for a cut of any winnings.
The breakthrough came in October 1977, when Gould was finally granted US Patent 4,053,845 for the optical pumping of laser amplifiers. More followed:
By the time Gould won, lasers were a multi-billion-dollar industry. His patents covered an estimated 80% of all lasers in commercial use — supermarket barcode scanners, CD players, fiber-optic telecoms, eye surgery lasers, industrial cutters, military rangefinders. Companies that had been manufacturing and selling lasers for two decades suddenly owed royalties. Gould personally collected roughly $30 million before his patents expired in the early 1990s.
Why this matters now: Every modern photonics technology traces back to that 1957 notebook. The fiber-optic backbone of the internet uses semiconductor lasers Gould's patents anticipated. LiDAR units in self-driving cars, the 100+ lasers etching every smartphone chip during EUV lithography at TSMC, LASIK surgery, the laser interferometers that detected gravitational waves at LIGO in 2015, the green laser pointer in a high school classroom — all are descendants of stimulated emission in an optical cavity, the architecture Gould drew that Saturday night.
Gould's notebook also rewrote how inventors think about priority. Modern patent law (since the America Invents Act of 2011) is "first-to-file," not "first-to-invent" — partly a reaction to messes like Gould's. Had he filed in November 1957 instead of waiting to build a prototype, he would have owned the laser outright from the start. Instead, he won it back one courtroom at a time, finally cashing in on an industry he had named but not been allowed to enter.