Search Results for: Semiconductor device manufacture machine
patent in north america was issued to samuel winslow by the general court of massachusetts for a new method of making salt . [ ] [ ] [ ] on april , , president george washington signed the patent act of ( stat. ) into law which proclaimed that patents were to be authorized for "any useful art, manufacture
, engine, machine, or device, or any improvement therein not before known or used." [ ] on july , , samuel hopkins of philadelphia, pennsylvania, became the first person in the united states to file and to be granted a patent under the new u.s. patent statute. [ ] the patent act of (ch. , stat. ) further...
https://en.wikipedia.org/wiki/Timeline_of_United_States_inventions_(1890%E2%80%931945)