Alexander Graham Bell used metal detector to locate a bullet lodged in the chest of American President James Garfield
On Jul. 26, 1881, Alexander Graham Bell used a metal detector in an attempt to locate a bullet…
Biotechnology | Life Science History | Medical Device | Nanotechnology | Pharmaceutical | Therapeutics
Trademark registration was added to the functions of the The U.S. Patent and Trademark Office
In 1881, a trademark registration was added to the functions of the The U.S. Patent and Trademark Office…
Siemensﾠ developedﾠ theﾠ Phonophor, the firstﾠ Technicalﾠ solutionﾠ forﾠ hearing ﾠloss
In 1878, Siemens, now Sivantos,ﾠdevelopedﾠ the ﾠPhonophor, the first ﾠtechnicalﾠ solutionﾠ for ﾠhearing ﾠloss. The history of electrical…
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The first U.S. patent was signed by President George Washington
On Jul. 31, 1790, Samuel Hopkins was issued the first patent under the new U.S. patent statute signed…
Spectacles were invented
In 1285, spectacles were invented in Italy using convex lenses for the farsighted. The “Glasses Apostle” painting in…