Telegraph Hill in San Francisco City and County, California — The American West (Pacific Coastal)

Farnsworth's Green Street Lab

June 21, 2021

1. Farnsworth's Green Street Lab Marker

Inscription. In a simple laboratory on this site, 202 Green Street, Philo Taylor Farnsworth, U.S. pioneer in electronics,invented and patented the first operational all-electronic "television system" on September 7, 1927. The 21 year-old inventor and several dedicated assistants successfully transmitted the first all-electronic television image, the major breakthrough that brought the practical form of this invention to mankind. Further patents formulated here covered the basic concepts essential to modern television. The genius of Green Street, as he was known, died in 1971.

California Historical Landmark No. 941.
Plaque placed by the State Department of Parks
and Recreation in cooperation with the Philo T.
Farnsworth Foundation, Inc. September 15, 1981

Erected 1981 by State Department of Parks and Recreation in cooperation with the Philo T. Farnsworth Foundation. (Marker Number 941.)

Topics and series. This historical marker is listed in these topic lists: Communications • Notable Places • Science & Medicine. In addition, it is included in the California Historical Landmarks series list. A significant historical month for this entry is September 1787.

Location. 37° 48.019′ N, 122° 24.186′ W. Marker is in

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San Francisco, California, in San Francisco City and County. It is in Telegraph Hill. It is on Green Street. near Sansome Street, on the right when traveling west. Touch for map. Marker is at or near this postal address: 202 Green Street, San Francisco CA 94111, United States of America. Touch for directions.

Regionally, this marker is on California’s Coast Ranges.

It is also on the American Pacific Coast.

Globally, it is in North America,

on the Ring of Fire,

in the Pacific Rim,

in the Western Hemisphere,

in the Western World,

and in the Anglosphere.

Historically, it finds itself in what was once New Spain

and also Mexico’s Alta California.

Other nearby markers. At least 8 other markers are within walking distance of this marker: Bemis Bag Building - 1906 (within shouting distance of this marker); Telegraph Hill Historic District (about 400 feet away, measured in a direct line); 901 battery (about 500 feet away); Mona's 440 Club (approx. 0.2 miles away); Ship Brooklyn (approx. 0.2 miles away); Dirk Dirksen (approx. 0.2 miles away); Clark’s Point (approx. 0.2 miles away); The Jazz Workshop (approx. 0.2 miles away). Touch for a list and map of all markers in San Francisco.

Regarding Farnsworth's Green Street Lab. This site was designated as California Registered Historical Landmark No.971 on February 19, 1971.

Related markers. Click here for a list of markers that are related to this marker. The list includes other historical markers about Philo T. Farnsworth in Indiana and Utah.

Also see . . .
1. Philo Farnsworth. Wikipedia biography (Submitted on November 29, 2020, by Larry Gertner of New York, New York.)

2. Farnsworth's Green Street Lab. "Museum of the City of San Fransisco" entry (Submitted on July 17, 2009.)

Farnsworth's Green Street Lab and Marker image. Click for full size.

March 9, 2013

2. Farnsworth's Green Street Lab and Marker

The marker is visible here, mounted to a monument, on the corner. The Farnsworth lab building is directly behind it.

Philo Farnsworth image. Click for full size.

Photographed by Britannica, Unknown

3. Philo Farnsworth

Credits. This page was last revised on February 7, 2023. It was originally submitted on July 17, 2009, by Walter Barnes of San Pablo, California. This page has been viewed 3,301 times since then and 111 times this year. Photos: 1. submitted on April 13, 2022. 2. submitted on March 10, 2013. 3. submitted on November 29, 2020, by Larry Gertner of New York, New York. • Syd Whittle was the editor who published this page.