Patents Act, 1970
32. Anticipation by public working
An invention claimed in a complete specification shall not be
deemed to have been anticipated by reason only that at any time within one year
before the priority date of the relevant claim of the specification, the
invention was publicly worked in India-
(a) by the patentee or applicant for the patent or any person
from whom he derives title; or
(b) by any other person with the consent of the patentee or
applicant for the patent or any person from whom he derives title, if the
working was effected for the purpose of reasonable trial only and if it was
reasonably necessary, having regard to the nature of the invention, that the
working for that purpose should be effected in public.