Creating a Device from Patent Info: Is it Legal?

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Creating a device based on patent information can be legally problematic, even if the intention is not to sell it. Using a patented design without permission is considered infringement, as it constitutes profiting from someone else's intellectual property. While TENS devices are regulated and require a prescription, making a homemade version poses significant safety risks. The discussion emphasizes that constructing such a device without authorization is illegal and not advisable. Engaging with patented technology without proper licensing can lead to legal consequences.
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I have a device I need made, but I don't know if there is enough information in the patent to have an engineer create it.

Here is a link to the device.

http://www.google.com/patents?id=0xQqAAAAEBAJ&pg=PA1&lpg=PA1&dq=patent+5109848&source=bl&ots=mcrjhMRWKu&sig=ktW-a92a9ZXRf2rZyY_GBW3ssSk&hl=en&ei=9oKZSp7rA4T6MZX61MIF&sa=X&oi=book_result&ct=result&resnum=7#v=onepage&q=patent%205109848&f=false

Any idea how much would it cost to make something like this?
I will not be selling it,just need one unit, so it is legal.
 
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That's what is today referred to as a TENS (transcutaneous electrical nerve stimulation) device. They are only available with a physician's prescription. Although they are considered safe when used under a doctor's care, they can be dangerous if used improperly--a homemade unit, doubly so.

We cannot help you construct one.
 
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And it is illegal to construct one from someone else's patent, even if you aren't going to sell it. You're still stealing the idea and profiting from it (using it for free is profiting from it).
 
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