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What percentage of difference needs to take place for a design not to infringe on an existing patent? I have an invention that mirrors the claims of this one but my design might be different, I wish there were more detail in their drawing. Any help is greatly appreciated!

https://www.google.com/patents/US8191365?dq=intercooler&hl=en&sa=X&ei=A8L0U_yJKo3-yQT7moG4DA&ved=0CDgQ6AEwBA

Regards,

John Crosetto

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There is no % difference concept in patent law. The claims state what the patent owner has as his exclusive territory - drawings are just examples of a way to carry it out but the words of the claims set the boundaries between what you can and can't do.

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