 shall not extend to any letters patents ( b ) and grants of privilege for the term of fourteen years or under , hereafter to be made , of the sole working or making of any manner of new manufactures within this realm ( c ) to the true and first inventor ( d ) and inventors of such manufactures , which others at the time of making such letters patents and grants shall not use ( e ) , so as also they be not contrary to the law nor mischievous to the state by raising prices of commodities at home , or hurt of trade , or generally inconvenient ( f ) : the same fourteen years to be <unk> from the date of the first letters patents or grant of such privilege hereafter to be made , but that the same shall be of such force as they should be if this act had never been made , and of none other ( g ) . 
