Search Results for: Semiconductor device manufacture machine
, engine, machine, or device, or any improvement therein not before known or used". [ ] on july , , samuel hopkins of pittsford, vermont became the first person in the united states to file and to be granted a patent for an improved method of "making pot and pearl ashes". [ ] the patent act of (ch. ,
a milling machine is a machine tool used for the shaping of metal and other solid materials. in contrast to drilling, where the drill is moved exclusively along its axis, the milling operation uses movement of the rotating cutter sideways as well as 'in and out'. simeon north is generally credited for...
https://en.wikipedia.org/wiki/Timeline_of_United_States_inventions_(before_1890)