Color image of an Orpheus televisor made by Roth-Downs Manufacturing, c.1928.

Orpheus televisor

Orpheus televisor made by Roth-Downs Manufacturing, c.1928.

Black and white photograph of Minnesota State Fair-goers at KSTP television cameras of the telemobile, 1947.

KSTP telemobile

Minnesota State Fair-goers at KSTP television cameras of the telemobile, 1947.

Television in Minnesota, 1928–1961

Minnesota was a pioneer in the early years of broadcast television. From the 1920s through the 1960s, local stations achieved many national firsts and produced enduring TV legends.

Black and white dagram of the Thermo King Model A included in Frederick M. Jones’ 1939 patent application to the U.S. Patent and Trademark Office.

Thermo King Model A

Diagram of the Thermo King Model A included in Frederick M. Jones’ 1939 patent application to the U.S. Patent and Trademark Office.

Thermo King Model C

Front component of a Thermo King Model C. Image is from the Frederick M. Jones papers, Minnesota Historical Society, St. Paul.

Thermo King unit

Thermo King unit, c.1960. Image is from the Frederick M. Jones Papers, Minnesota Historical Society, St. Paul.

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.

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