Black and white photograph of Medtronic Founder Earl Bakken and Medtronic CEO Winston Wallin with an early pacemaker model, 1986. Photographed by Jeffrey Grosscup.

Medtronic Founder Earl Bakken and Winston Wallin with Early Pacemaker

Medtronic Founder Earl Bakken and Medtronic CEO Winston Wallin with an early pacemaker model, 1986. Photographed by Jeffrey Grosscup.

Black and white photograph of a KSTP-TV tower on University Avenue, 1948.

KSTP-TV tower

KSTP-TV tower on University Avenue, 1948.

Black and white photograph of a KSTP-TV cameraman filming the This Side Up program, 1950.

"This Side Up" program

KSTP-TV cameraman filming the This Side Up program, 1950.

Black and white photograph of the Twin City Television Lab’s mobile unit, c.1948.

Twin City Television Lab mobile unit

Twin City Television Lab’s mobile unit, c.1948.

Black and white photograph of a Twin City Television Lab mobile unit in front of the Lyceum Theater and the Lab’s main entrance, c.1948.

Twin City Television at the Lyceum Theater

Twin City Television Lab mobile unit in front of the Lyceum Theater and the Lab’s main entrance, c.1948.

Black and white photograph of a WTCN-TV employee with an Emerson television set, 1949.

WTCN-TV employee

WTCN-TV employee with an Emerson television set, 1949.

Black and white photograph of Twin City Television Lab broadcasting at the Minnesota State Fair, 1947.

Twin City Television lab at the State Fair

Twin City Television Lab broadcasting at the Minnesota State Fair, 1947.

Color image of an Arvin television console made by Noblitt-Sparks Industries, Columbus, Indiana, c.1950.

Arvin television

Arvin television console made by Noblitt-Sparks Industries, Columbus, Indiana, c.1950.

Black and white photograph of a WDGY radio tower, 1947. Photographed by the Minneapolis Star Journal.  The optometry shop of Dr. George Young, the founder of WDGY, is visible below the tower.

WDGY radio tower

WDGY radio tower, 1947. Photographed by the Minneapolis Star Journal. The optometry shop of Dr. George Young, the founder of WDGY, is visible below the tower.

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

Orpheus televisor

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

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