He was the only American president to hold a US patent.
- Jimmy Carter
- Thomas Jefferson
- Abraham Lincoln
- Theodore Roosevelt
Abraham Lincoln. On 22 May 1849, Lincoln received patent number 6,469; a device for buoying vessels through shallow waters.
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HistoryNet Staff (2/27/2026) Daily Quiz for April 5, 2019. HistoryNet Retrieved from https://historynet.com/quiz190405/.
"Daily Quiz for April 5, 2019."HistoryNet Staff - 2/27/2026, https://historynet.com/quiz190405/
HistoryNet Staff 4/5/2019 Daily Quiz for April 5, 2019., viewed 2/27/2026,<https://historynet.com/quiz190405/>
HistoryNet Staff - Daily Quiz for April 5, 2019. [Internet]. [Accessed 2/27/2026]. Available from: https://historynet.com/quiz190405/
HistoryNet Staff. "Daily Quiz for April 5, 2019." HistoryNet Staff - Accessed 2/27/2026. https://historynet.com/quiz190405/
"Daily Quiz for April 5, 2019." HistoryNet Staff [Online]. Available: https://historynet.com/quiz190405/. [Accessed: 2/27/2026]