how to prevent patent infringement
No patent proprietor in any case qualified for help for encroachment or contributory encroachment of a patent will be denied help or considered at fault for abuse or unlawful expansion of the patent right by reason of his having done at least one of the following:
(4) would not permit or use any liberties to the patent or the offer of the protected item in exchange for obtaining a permit to liberties in another patent
No patent proprietor in any case qualified for help for encroachment or contributory encroachment of a patent will be denied help or considered at fault for abuse or unlawful expansion of the patent right by reason of his having done at least one of the following:
(4) would not permit or use any liberties to the patent or the offer of the protected item in exchange for obtaining a permit to liberties in another patent