Mr Norburn was successfully treated for prostate cancer through cryo-therapy, a method of treatment that involves destroying abnormal tissue by freezing it.

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Mutual funds use a highest in, first out method of tax treatment and portfolio tax management.

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Prometheus calls that accusation absurd and said only researchers who use its reference numbers as part of a treatment method could be accused of infringing.

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In fact, tattooing is an acceptable form of identification for animals and even is one method advocated by People for the Ethical Treatment of Animals.

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Increasing the number of people on treatment is being advocated as an HIV prevention method in the Canadian province of British Columbia.

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While there have been other patents awarded on treatment methods, Singer said, they require doctors to use a new method of diagnosis or a new method to measure some level in the body.

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