20 January 1885
On 20 January 1885, LaMarcus Adna Thompson received US Patent No. 310,966 for a “Roller coasting structure”.
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Read More20 January 1885
19 January 1915
On 19 January 1915, George Claude received US Patent No. 1,125,476 for a “System of illuminating by luminescent tubes”.
17 January 1882
On 17 January 1882, Leroy B Firman received US Patent No. 252,576 for a “Multiple switch-board for telephone-exchanges”.
15 January 1861
On January 1861, Elisha Otis received U.S. Patent No. 31,128 for an “Improvement in hoisting apparatus”. It captured the breakthrough that made vertical travel trustworthy.
15 January 1885
On 15 January 1885, Paul Nipkow received German Patent No. 30105 for an “Electric telescope”, later known for the Nipkow disk for mechanical television scanning.