1921 Article Invention Patent Record Poison Tablet Science Research Magnetic SI1

This is an original 1921 one-page article (one single-sided page) of recent patents of the time. Shown is a phonograph record lifter, a revolving wing flying machine, a radio telegraphy, a magnetic deflector for electric arcs, a vision deflector, a poison tablet, a radio receiving system, a submarine vessel, and an automobile traffic signal.CONDITIONThis 90+ year old Item is rated Near Mint / Very Fine. Light aging throughout. No creases. No natural defects. No surface rub. No tears. No water damage. Product Type: Original Print Article; Black / White Grade: Near Mint / Very Fine Dimensions: Approximately 7.5 x 10.75 inches; 19 x 27 cm Authentication: Serial-Numbered Certificate of Authenticity w/ Full Provenance Protection: Packaged in a custom archival sleeve with an acid-free black board (great for display, gift-giving, and preservation) Keywords specific to this image: Joseph Menchen, Alexis Beurrier, Edouard Bigourdan, Louis Lacoin, William Ogle Snyder, John Hays Hammond, Jo