To be able to be protected by a patent, your invention must meet certain criteria:
have an inventive step that is not obvious to someone with knowledge and experience in the subject and;
be capable of being made or used in some kind of industry.
Of equal importance your invention must not be:
a scientific or mathematical discovery, theory or method;
a literary, dramatic, musical or artistic work;
a way of performing a mental act, playing a game or doing business;
the presentation of information, or some computer programs;
an animal or plant variety (special rules govern plant varieties, see future articles);
a method of medical treatment or diagnosis; and
against public policy or morality.
If your invention meets these requirements it may be eligible for patent protection. It is always advisable to seek specialist legal advice.