When an invention is made, the inventor has three possible
courses of action open to him: he can give the invention to the world by
publishing it, keep the idea secret, or (36) it.
A granted patent is the result of a (37) struck between
an inventor and the state, by which the inventor gets a limited period of
(38) and publishes full details of his invention to the public
after that period (39) . Only in the most
(40) circumstances is the life span of a patent extended to
alter this normal process of events. A patent remains
(41) public after it has terminated. Indeed, patent experts of-
ten advise anyone wishing to avoid the high cost of (42) a
search through live patents that the one sure way of avoiding violation of any
other inventor’s right is to steal and use a dead patent. Likewise, because
publication of an idea in any other form permanently (43)
further patents on that idea, it is traditionally safe to take ideas
from other areas of print. (44) Anyone
closely involved in patents and inventions soon learns that most new ideas are,
in fact, as old as the hills. (45) that makes news and money.
The basic patent for the theory of magnetic recording dates back to 1886.
(46) Even the Volkswagen rear engine car was anticipated by a
1904 patent for a cart with the horse at the rear.
【参考答案】
It is their reduction to commercial practice，either through ......