San Francisco, CA, United States
Farnsworth 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....
Listen to the audio guide for Bronze plaque № 41263 Free on WIP — starts by itself when you arrive, even with the screen off