3/10/2007
Landmark information
- Location:
NW corner of Sansome and Green Sts, San Francisco - Plaque:
Official State Plaque - Site:
Nothing Remains - Date First Visited:
7/6/1996 - Date Most Recently Visited:
3/10/2007 - GPS Coordinates:
N 37 48.023, W 122 24.165 - Other Designations:
National Historic Landmark
National Register of Historic Places
About this landmark
Plaque text:
"Farnsworth's Green Street Lab"
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 know, died in 1971.