1920 Article Patent Phonograph Clock Magnet Spark Plug Reading Light Compass SI1

This is an original 1920 one-page article (one single-sided page) of the latest patents of the time. Shown is the multi-record phonograph, the phonograph vibration device, an oxygen and hydrogen generator, an electrically driven clock, a controlling field of magnets, a reading light, an electric oven, a spark plug tester, colored moving pictures and a magnetic compass.CONDITIONThis 91+ year old Item is rated Near Mint / Very Fine. Light aging throughout. Light wrinkling. 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 7.25 x 10.5 inches; 18 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: Gustave Miller, Robert G. Brown, Mervyn O'Gorman, Henry E. Warren, H. S. Fo