Abstract: A method is disclosed for authenticating a product. The method comprises: receiving a verification code associated with the product; applying an electric field to a liquid crystal device (100) located in or on the product, the liquid crystal device (100) comprising: a first substrate (105); a second substrate (110) spaced apart from the first substrate (105); a liquid crystal composition (115) located between the first substrate (105) and the second substrate (110); wherein the liquid crystal composition (115) comprises one or more regions (120) of polymerised liquid crystal composition; and a first electrode (125) and a second electrode (130) configured to apply the electric field; comparing a display output by the liquid crystal device (100) in response to the application of the electric field to the verification code associated with the product; wherein, if the display output by the liquid crystal device (100) matches the verification code associated with the product, the product is authenticated.

Abstract: An attachment to a wheel chair, which may be in the form of a basket or a tray, has a substantially rigid planar base portion, which has two sides. A pair of legs extend downwardly from each side of the base and a foot is positioned at the bottom of each leg. Each foot is adapted to rest upon the forward outer edge of the seat or on a support member positioned just below the seat, one support member on each side of a wheelchair. The attachment also has a pair of arms, one arm extending rearward from each side of the base and at the distal end of each arm there is an inwardly extending finger. The inwardly extending fingers are adapted to fit around the outer edges of the upwardly extending back of a wheel chair.