law: 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.