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1 vote

Patent US640598A

The picture shows only half of the Tool, the patent US 640,598 describes the invention was a tool useful in the building of wire fences, as well as the other specific uses.
RishiM's user avatar
  • 1,191
1 vote

Tool for checking/proving the appearance of a product in the market

The Wayback Machine is actually the closest thing available for this too, even if it's not quite the main purpose. This should show, in most cases, at least when a product is offered for sale. Though ...
Maca's user avatar
  • 6,178
1 vote

making and selling protected patent

Technology can be licenced from expired patents but it is rare. Usually in the form of trade secrets that have been held back from the patented material, eg: Source code of a patented algorithm. It ...
3dalliance's user avatar

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