History
Who Invented the Tattoo Machine?
The short answer is Samuel O'Reilly in 1891, built on Edison's electric pen, then changed forever by Charlie Wagner. Here is the documented lineage.
The first patent for an electric tattoo machine went to Samuel F. O'Reilly, an Irish-American tattooer working on New York City's Bowery, who was granted U.S. Patent No. 464,801 on December 8, 1891. That patent, public record and viewable today through the USPTO, is the foundational document of American electric tattooing. So if you want one name and one date for "who invented the tattoo machine," it is O'Reilly, 1891, Chatham Square. That is the honest, sourced answer.
But the fuller answer has three names, not one. O'Reilly did not start from nothing. He adapted Thomas Edison's electric pen, patented in 1876 as a device for copying documents. And O'Reilly's rotary machine was not the machine most tattooers use today. The configuration that became the modern standard came from Charlie Wagner, O'Reilly's Bowery successor, whose 1904 patent introduced the vertical electromagnetic coils that still define the coil machine. The real lineage runs Edison to O'Reilly to Wagner, and each man solved a different problem.
Edison built the engine, for paper not skin
On August 8, 1876, the U.S. Patent Office issued Patent No. 180,857 to Thomas A. Edison for an "Autographic Printing" device, popularly called the electric pen. A small electric motor at the top of the handle drove a steel needle up and down through a hollow tube fast enough to perforate a stencil sheet, letting a clerk duplicate handwriting. It was Edison's first commercially successful invention, sold through the Western Electric Manufacturing Company, and it was built for the office, not the body.
The mechanism, a reciprocating needle driven by an electric motor, is the direct ancestor of every electric tattoo machine that followed. That is a genealogical claim, documented through both patents, and it is the part people get wrong. Edison did not invent the tattoo machine. He never designed his pen for skin and never marketed it that way. The popular "Edison invented tattooing" line is folklore. What he supplied was the engine. Someone still had to point it at flesh.
O'Reilly pointed it at skin (1891)
Samuel O'Reilly was born in Waterbury, Connecticut, in May 1854 to Irish immigrants, and was tattooing in New York by the mid-1880s, with his earliest documented address at #5 Chatham Square on the Bowery confirmed by 1887 in period city directories. He is consistently identified across the trade-history record as having been informally mentored by Martin Hildebrandt, the German-American tattooer whose roughly 1846 shop is often called the first permanent professional tattoo shop in the United States. That makes O'Reilly the second generation of the Bowery, working in a real lineage.
Before the patent, O'Reilly tattooed using a modified dental plugger, a dentist's reciprocating-needle tool, on dime-museum attractions between about 1889 and 1891, including his own brother John O'Reilly, billed as "The Tattooed Irishman." When the patent was granted on December 8, 1891, it was recording a machine already at work, not a sketch. Architecturally, O'Reilly's machine kept Edison's rotary-motor-plus-reciprocating-needle layout but added three things tuned for skin: a tubular needle holder, an integrated pigment reservoir so color was drawn into each perforation, and adjustments to the needle-bar travel to handle the resistance of skin, which paper never offered.
Was it just a battery bolted to an Edison pen? No, and O'Reilly said so himself. In an **1898 interview with the New York Sun** he stated that he had experimented with both the Edison pen and the dental plugger and found them "too weak to penetrate the skin," which is why the final design carried an original needle-bar and tube assembly rather than a drop-in conversion. The strong "simple conversion" framing you see online is an oversimplification of the patent record. The architectural inheritance from Edison is real. The "he just copied it" claim is not.
One worthwhile correction for searchers: British tattoo lore sometimes credits Tom Riley with a parallel 1891 British patent. No surfaced primary record supports that. The first confirmed British electric-tattoo-machine patent went to Sutherland Macdonald, British Patent No. 3035, in 1894, three years after O'Reilly. O'Reilly's 1891 U.S. patent stands as the world's first issued electric-tattoo-machine patent, with no contested concurrent grant.
Wagner built the machine you actually use (1904)
If you tattoo with a coil machine today, you are working in Charlie Wagner's lineage, not strictly O'Reilly's. Wagner, born Karl Eduard Joseph Wiegner in Prešov in 1875, worked in close association with O'Reilly at 11 Chatham Square and took over that shop after O'Reilly died in a fall from a ladder in April 1909. Wagner ran 11 Chatham Square for roughly forty-four years and supplied machines and flash nationally from a factory at 208 Bowery.
His lasting contribution is U.S. Patent No. 768,413, filed April 19, 1904 and issued August 23, 1904. Where O'Reilly's machine was rotary, a motor turning a cam to drive the needle bar, Wagner's used two electromagnetic coils mounted vertically, in line with the tube. The coils pulled an iron armature down against a spring, a contact screw broke the circuit at the bottom of the stroke, the spring returned the bar, the contact closed, and the cycle repeated as a self-oscillating relay. That vertical-coil-and-tube alignment is the configuration in virtually every coil machine built since. The patent was witnessed by Lewis "Lew the Jew" Alberts, a documented colleague, which independently anchors that working relationship.
One more correction for the record: popular sources sometimes call Wagner "the inventor of modern tattooing." That overclaims. He patented the coil configuration that became the standard. He did not invent the electric tattoo machine. O'Reilly's patent precedes his by thirteen years.
After Wagner: coil, then rotary again
The line did not stop in 1904. Percy Waters of Detroit patented a refined coil machine in 1929 and ran one of the largest supply operations of the interwar period, shipping machines across North America. Through the 1930s to the 1970s, machine-building stayed a practitioner trade, carried by builder-suppliers like Owen Jensen, Paul Rogers, and the Spaulding & Rogers company founded in 1956. A 1979 patent by Carol Nightingale is one of the better-known later refinements.
Then the wheel turned back. Beginning in the early 2000s, the German manufacturer MT.DERM, with the Cheyenne Hawk, revived the rotary mechanism in a sealed, medical-grade, cartridge-fed pen-style form, and rotary machines became the dominant choice for new tattooers by the late 2010s. In mechanism, that is a return to Edison and O'Reilly's rotary idea, refined.
So who invented the tattoo machine? O'Reilly patented the first one in 1891, on Edison's 1876 engine, and Wagner gave us the coil machine in 1904. Three names, three problems solved. Anyone who tells you it was one person is selling you a tidier story than the record supports.
ATLAS PRESS is the articles and opinion desk of the Tattoo History Atlas. For the full story, read The History of Tattooing, a free and sourced timeline.