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Around 1896, with his business in machinery progressing, Hubbell's next patent was a major breakthrough in the fastener industry: the process and machinery for cold rolled screw threads which reduced the rate of material lost in production by more than 50%. He designed and built progressive blanking and forming dies, patented machinery to slot ...
He quickly began selling his newly devised manufacturing equipment alongside his commercial products. Hubbell received at least 45 patents, [3] most of which were for electric products. The pull-chain electrical light socket was patented in 1896, and his most famous invention, the U.S. electrical power plug, in 1904.
Hubbell's first design was a socket which screwed into a lampholder (like the early lampholder plugs), but with a separable plug with pins (U.S. patent 774,250) or blades (US patent 774251). The 1906 Hubbell catalog [4] shows the blade plug with a flush mounting socket for use in wall or floor. Other manufacturers adopted the Hubbell pattern ...
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In its efforts to rise from the ashes, Kodak announced plans to auction off about 1,100 patents from its portfolio of nearly 11,000. Kodak's hope is to Google, Apple, RIM, and Others Nab Kodak Patents
The list of Reginald Fessenden patents contains the innovation of his pioneering experiments. ... "Dynamo-Electric Machinery" – 4 January 1916; U.S. patent ...