Image: Lee de Forest 2012 002 6580 sx61dn13g cropf
Description: Lee de Forest at Beckman Instruments in Munich, Germany Lee de Forest (1873–1961) was an inventor, most notably of Audion vacuum tubes in the early twentieth century. His serial business ventures included work in radio, telegraphy, telephony, broadcasting, and film. Arnold O. Beckman fêted Lee de Forest at the new Munich facility of Beckman Instruments. Published without a copyright notice in the Beckman Division Feedback newsletter, No. 5, May 1955 (BHC box 10, folder 1). Digitized for the Beckman Legacy Project.
Title: Lee de Forest at Beckman Instruments in Munich, Germany
Credit: https://digital.sciencehistory.org/works/xk81jm308
Author: Unknown authorUnknown author
Permission: This work is in the public domain in the United States because it was published in the United States between 1928 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
Usage Terms: Public domain
License: Public domain
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