How do I find out if a patented invention is being used somewhere?

質問

f a patent is being used by a firm or in any industry, how can I learn if it is actively being used? Meaning, if it is useful or not?

we are very interested in a certain patent. We would like to know if it is widely used and to determine its value.

or

回答: 2 public & 1 非公開

弁理士

Investigating and proving USE of patented entities or processes fuels numerous service industries, e. g. for patent licensing or litigation. The patent proprietor MAY know, from experience and/or Investigation where the patent is used.
USEFULNESS appears to be a different issue.
Is it your interest to buy or licence the patent?
Contact a Patent Attorney whom you like and trust, before your "interest" becomes expensive.
Feel free to contact me.

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