Black and white photograph of Frederick McKinley Jones standing next to a truck outfitted with a mobile refrigeration unit, c.1950.

Frederick McKinley Jones

Frederick McKinley Jones standing next to a truck outfitted with a mobile refrigeration unit, c.1950.

Thermo King Model C

In 1939, Frederick McKinley Jones patented the world’s first successful refrigerated transportation system. At the time, he was working for the Minneapolis-based company U.S. Thermo Control. Two years later, he released an improved version, the Model C, which revolutionized the agriculture and military industries.

MN90: Honeywell's Hot Little Thermostat

The Honeywell round thermostat design is one of the most user-friendly and underappreciated appliance designs of all time. MN90 Producer Andi McDaniel explains what has made the “T86 Round” so popular and so enduring.

MN90: Honeywell's Hot Little Thermostat

The Honeywell round thermostat design is one of the most user-friendly and underappreciated appliance designs of all time. MN90 Producer Andi McDaniel explains what has made the “T86 Round” so popular and so enduring.

Black and white image of Honeywell Round thermostat.

Honeywell Round thermostat

The Honeywell Round, 2007. Photograph by Wikimedia Commons user Flickr user midnightcomm.

Color image of Honeywell Chronotherm counter sign.

Honeywell Chronotherm counter sign

Metal stand-up counter sign advertising the Minneapolis-Honeywell Regulator Company's Chronotherm Automatic Thermostat. Created by Donaldson Art Sign between 1930 and 1945.

Black and white photograph of Honeywell Round thermostats ready for final checkout and packaging at a factory in Golden Valley, c.1955.

Honeywell Round thermostats ready for final checkout and packaging

Honeywell Round thermostats ready for final checkout and packaging at a factory in Golden Valley, c.1955.

Honeywell Round Thermostat

The world's most iconic home thermostat was created in Minneapolis. The Round, designed by engineer Carl Kronmiller and designer Henry Dreyfuss, was introduced in 1953 by the company then known as Minneapolis-Honeywell. The Round became both a sales mainstay and a world-renowned piece of industrial art.

Lillehei, C. Walton (1918–1999)

Dr. C. Walton Lillehei was a world-famous professor of surgery at the University of Minnesota and an innovator in the field of open-heart surgery. He participated in the world's first successful open-heart operation, developed techniques and devices that made open-heart surgery more successful, and pioneered the use of pacemakers and artificial heart valves.

Photograph of the Pietenpol Field Hangar, moved to EAA Airventure Museum Pioneer Field in 1984.

Pietenpol Field Hangar

Pietenpol Field Hangar, moved to EAA Airventure Museum Pioneer Field in 1984. Photograph by Wikimedia Commons user FlugKerl2.

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