This Day in Patent History - On November 2,1880, Johnson Powell received a patent for an eye-protector On November 2,1880, Johnson Powell received a patent for an eye-protector for use of furnace men, puddlers, firemen, and others exposed to glare of strong…
Nikola Tesla Patent #5 – Regulator for dynamo-electric machines – US 336962 Patent Information Publication number: US336962 A Publication type: Grant Publication date:…
