The Bobcat is the loader on every job site. Louis and Cyril Keller, two welders in Rothsay, Minnesota, built it for a turkey farmer who needed his barn cleaned - from junkyard scrap, in six weeks. Neither brother went past 8th grade. The manure fork was bars off the old Rothsay jail. A farm-equipment maker, Melroe, saw it at the state fair and named it Bobcat. Louis's son Joe says it replaced the pitchfork and the wheelbarrow.
The Bobcat Was Built From Junkyard Scrap and Jail Bars
Every Bobcat skid-steer loader in the world - the little machine scooping snow off driveways and dirt off job sites - traces back to two brothers in a one-room welding shop who never finished the eighth grade.
A Turkey Barn Nobody Could Clean
In the mid-1950s, Louis and Cyril Keller ran a small blacksmith and welding shop in Rothsay, Minnesota, a farm town of a few hundred people. Louis had opened it in 1947 after serving in the Army in World War II. Cyril, a Navy veteran, joined him a few years later.
A local turkey farmer came to them with a problem. His barn had an upper level packed with manure, and nothing on the market was small enough to fit inside it or light enough to be hoisted up to the second floor.
Six Weeks, One Junkyard
The Kellers had no engineering degree and no blueprint to work from. What they had was a welding shop and a junkyard down the road.
They built a three-wheeled loader from salvaged parts in about six weeks. For the manure fork, they welded on a set of iron bars pulled from the old Rothsay jail.
The machine had no steering wheel and no transmission. Two hand levers let one side drive forward while the other reversed, so it could spin and turn inside a space barely bigger than itself.
From a State Fair to a New Name
Melroe Manufacturing, an equipment maker based across the border in Gwinner, North Dakota, spotted the little loader at the Minnesota State Fair in the late 1950s. The company licensed it on the spot.
The Kellers sold their business and went to work for Melroe. In 1960, the company added a second set of drive wheels, creating the four-wheel M400.
In 1962, Melroe gave the machine a new name: Bobcat. The loader now accounts for roughly 40 percent of the global skid-steer market.
Neither Brother Made It Past Eighth Grade
Louis and Cyril Keller went on to hold six U.S. patents between them, including the clutch system that let the loader turn without a steering wheel. Both were inducted into the National Inventors Hall of Fame in 2023.
Joe Keller, Louis's son, later summed up what his father and uncle built with a farmer's own math.
"The tractor replaced the horse and oxen. The Bobcat replaced the pitchfork and wheelbarrow."
Frequently Asked Questions
Who invented the Bobcat skid-steer loader?
Why did the Keller brothers use jail bars on the loader?
How did the Bobcat get its name?
How much schooling did Louis and Cyril Keller have?
How big is the skid-steer loader market today?
Verified Fact
This fact has been reviewed and verified against original sources.
Source: AgWeekShow verification details
Audited 2026-08-19 (fact-verifier gate). 4 primary sources independently re-fetched in full: AgWeek Jan 30 2023 (source_url), invent.org Louis Keller, invent.org Cyril Keller, Wikipedia Bobcat Company. Claims checked: Rothsay MN shop / 8th-grade education both brothers CONFIRMED (AgWeek + both invent.org pages verbatim). Louis Army WWII staff sergeant, shop founded 1947 CONFIRMED (invent.org Louis). Cyril US Navy WWII CONFIRMED (invent.org Cyril). Turkey-barn need + six-week junkyard build + jail-bar manure-fork tines CONFIRMED (invent.org both pages, near-verbatim wording). 1957 (AgWeek) vs 1958 (invent.org + Wikipedia) State Fair year conflict CONFIRMED as genuine cross-source disagreement -- copy correctly hedges to "late 1950s" rather than asserting either. 1960 M400 four-wheel model CONFIRMED (invent.org, Wikipedia, bobcat.com). 1962 Bobcat name CONFIRMED; naming MECHANISM correctly left unasserted -- invent.org gives none, Wikipedia attributes it to Les Melroe + ad agent Lynn Bickett on a drive, a third account (employee suggestion box) exists elsewhere and is NOT in our copy. Confirmed no mechanism is asserted anywhere in text/article/faqs. Serial #1 survival claim CONFIRMED absent from all fields (correctly dropped as unverifiable). Joe Keller quote CONFIRMED verbatim against AgWeek: "The tractor replaced the horse and oxen. The Bobcat replaced the pitchfork and wheelbarrow." Six US patents CONFIRMED (AgWeek + invent.org, patent No. 3,151,503 cited). 2023 NIHF induction CONFIRMED both brothers. No-steering-wheel / two-hand-lever spin-in-place mechanism in social_engagement_comment CONFIRMED verbatim against invent.org Cyril Keller page. 40 percent global skid-steer market share CONFIRMED verbatim in AgWeek source_url ("accounts for 40% of the global market for skid steers") -- citation fidelity passes, source_url directly supports the headline specifics. Reversed-agency check: Kellers built for the farmer (not reverse), Melroe renamed the Kellers machine (not reverse) -- correct both directions. DISCREPANCY FOUND AND CORRECTED: article called the 1960 M400 "widely considered the first true skid-steer loader" -- this superlative is NOT supported by AgWeek, Wikipedia, invent.org (either page), or bobcat.com/company/history (all four independently checked, none uses this framing) -- an invented-precision/over-claim superlative risking a pedant dunk from equipment historians. Removed the unsupported clause in place; sentence now reads "In 1960, the company added a second set of drive wheels, creating the four-wheel M400." No other field affected. Numeric coherence: all figures (8th grade x2, six weeks, six patents, 1960/1962/2023 dates, 40 percent) internally consistent and source-matched. Legibility: sentence one ("The Bobcat is the loader on every job site") establishes the object plainly for a non-fan; no unestablished referents; single payoff (pitchfork/wheelbarrow line) lands as the human-beat closer in both social_text and caption; no emdashes; caption uses blank-line paragraph breaks (SQL-verified). social_text is 441 chars -- over the 420-preferred but under the 450 hard stop; left as-is because shorter drafts tested required cutting the "Louis's son" referent for Joe Keller, trading legibility for a soft length preference. Tone: no deaths, no Doosan/sale/money, wholesome self-made-inventor arc -- fun-brand pass, no exclude flag needed. Tier MEGA + share_detonator (operators/landscapers/farmers/snow-crew tribe) both hold up -- brand-as-story engine=2 correct, affinity_pool=2 defensible for a mass-recognized job-site machine. No changes to text/social_text/social_caption/social_engagement_comment/social_link_comment/tier/engine/affinity_pool -- only article corrected (one sentence) and status upgraded to verified.
