Edwin Howard Armstrong isn’t exactly a well-known inventor, but his work in radio literally changed communications around the globe. But his most famous invention – FM radio – became a source of constant frustration after he developed it.

Research:

• Armstrong, Edwin H. “Frequency Modulation and Its Future Uses.” The Annals of the American Academy of Political and Social Science, vol. 213, 1941, pp. 153–61. JSTOR, http://www.jstor.org/stable/1024069
• Armstrong, Edwin H. “Personalities in Science.” Scientific American, vol. 154, no. 1, 1936, pp. 3–3. JSTOR, http://www.jstor.org/stable/26144367
• “First public radio broadcast.” Guinness World Records. https://www.guinnessworldrecords.com/world-records/381969-first-public-radio-broadcast
• “FM Inventor Dies in Fall.” The Patriot News. Feb. 2, 1954. https://www.newspapers.com/image/1094174282/?match=1&terms=%22Edwin%20Howard%20Armstrong%22
• Lessing, Lawrence P.. "Edwin H. Armstrong". Encyclopedia Britannica, 14 Dec. 2024, https://www.britannica.com/biography/Edwin-H-Armstrong
• Lessing, Lawrence P. “Man of High Fidelity: Edwin Howard Armstrong.” Bantam. 1969.
• Lessing, Lawrence P. “The Late Edwin H. Armstrong.” Scientific American, vol. 190, no. 4, 1954, pp. 64–69. JSTOR, http://www.jstor.org/stable/24944524
• “Proceedings of the Institute of Radio Engineers, Volume 5.” Institute of Radio Engineers. 1917. Accessed online: https://books.google.com/books?id=YEASAAAAIAAJ&source=gbs_navlinks_s
• “Radio Broadcast.” Garden City, N.Y.: Doubleday, Page & Co., 1922-1930. https://babel.hathitrust.org/cgi/pt?id=iau.31858044013914&view=1up&seq=277
• “Telephoning Without Wires.” The Fort Wayne Journal Gazette. Oct. 20, 1907. https://www.newspapers.com/image/29125618/?match=1&terms=audion%20%22de%20Forest%22
• Tsividis, Yannis. “Edwin Armstrong: Pioneer of the Airwaves.” Columbia Magazine. April 1, 2002. https://magazine.columbia.edu/article/edwin-armstrong-pioneer-airwaves
• Turner, H. M. “Dr. Edwin H. Armstrong, Edison Medalist.” The Scientific Monthly, vol. 56, no. 2, 1943, pp. 185–87. JSTOR, http://www.jstor.org/stable/17796
• “What’s the Difference Between AM and FM Radio?” National Inventors Hall of Fame. Aug, 16, 2023. https://www.invent.org/blog/trends-stem/difference-between-am-fm

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Before the ballpoint pen, people used their hands, reeds, bamboo, brushes, quills, and eventually nibs to write or draw. But how did things evolve from there to get to things like the fountain pen, and eventually, a ballpoint?

Research:

• "pen." Britannica Library, Encyclopædia Britannica, 26 Jul. 2021. libraries.state.ma.us/login?eburl=https%3A%2F%2Flibrary.eb.com&ebtarget=%2Flevels%2Freferencecenter%2Farticle%2Fpen%2F59036&ebboatid=9265652. Accessed 13 Jun. 2025.
• "Pen." UXL Science, UXL, 2008. Gale In Context: Science, link.gale.com/apps/doc/CV2646000736/GPS?u=mlin_n_melpub&sid=bookmark-GPS&xid=52ede570. Accessed 27 May 2025
• “Patent of Mr. Frederick Bartholomew Folsch, of Oxford street, for improvements on instruments, and pens, to facilitate writing.” https://archive.org/details/jstor-30072521/mode/2up
• Bayley, Stephen. “Obituary: Baron Marcel Bich.” The Independent. 6/1/1994. https://www.independent.co.uk/news/people/obituary-baron-marcel-bich-1419867.html
• Bourque, Joseph. “The Waterman Pen.” American Heritage. Jul/Aug92, Vol. 43 Issue 4, p30.
• Brachmann, Steve. “The Evolution of Modern Ballpoint Pen: A Patent History.” IP Watchdog. 12/10/2014. https://ipwatchdog.com/2014/12/10/the-evolution-of-modern-ballpoint-pen-a-patent-history/id=52550/
• Cross, Alonzo T. “Stylographic Pen.” U.S. Patent 232804. 10/5/1880.
• Daniels, Maygene. “The Ingenious Pen: American Writing Implements from the Eighteenth Century to the Twentieth.” The American Archivist , Summer, 1980, Vol. 43, No. 3 (Summer, 1980). Via JSTOR. https://www.jstor.org/stable/40292316
• Di Nardo, Sam. “When was the Fountain Pen Invented: A Brief History.” Dayspring Pens. 1/2/2023. https://www.dayspringpens.com/blogs/the-jotted-line/when-was-the-fountain-pen-invented-a-brief-history-1
• Di Nardo, Sam. “Who Invented the Ballpoint Pen?: A Brief History.” Sayspring Pens. s1/2/2023. https://www.dayspringpens.com/blogs/the-jotted-line/who-invented-the-ballpoint-pen-history?srsltid=AfmBOopQR061KHIKpgm_a0a0IHiTSiY_V-ahwIFQxU5MYzLLQ5vpHjXv
• Dowling, Stephen. “The cheap pen that changed writing forever.” BBC. 10/29/2020. https://www.bbc.com/future/article/20201028-history-of-the-ballpoint-pen
• German Patent and Trademark Office. “László Biró´s 125th birthday.” https://www.dpma.de/english/our_office/publications/milestones/inventionsthatmadehistory/kugelschreiber/index.html
• Laszlo, Josef Biro. “Writing Instrument.” U.S. patent 2390636. 12/11/1945.
• Loud, J.J. “Pen.” U.S. Patent 392046. 10/30/1888.
• National inventors Hall of Fame. “Laszlo Josef Biro.” https://www.invent.org/inductees/laszlo-josef-biro
• Riesberg, Van Vechton. “Fountain Pen.” U.S. Patent 1171652. 2/15/1916.
• Rothman, Lily. “Why the Invention of the Ballpoint Pen Was Such a Big Deal.” Time. 10/29/2015. https://time.com/4083274/ballpoint-pen/
• The American Society of Mechanical Engineers. “#236 Birome Ballpoint Pen Collection.” https://www.asme.org/about-asme/engineering-history/landmarks/236-birome-ballpoint-pen-collection
• Waterman, L.E. “Fountain Pen.” U.S. Patent 293545. 2/12/1884.

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This 2022 episode starts with the story of John Bibb, credited with cultivating Bibb lettuce. But his family’s legacy, good and bad, is all tied to having enslaved people build their familial wealth.

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