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Investigation of specifications published previous to application.
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21.—(1) In addition to the investigation under the last preceding section, the examiner shall make an investigation for the purpose of ascertaining whether the invention claimed has been wholly or in part claimed in any specification published on or after the date of the application and deposited pursuant to a prior application.
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(2) Where on such further investigation it appears that the invention claimed has been wholly or in part claimed in any such specification, the applicant shall, whether or not his specification has been accepted or a patent granted to him, be afforded such facilities as may be prescribed for amending his specification, and in the event of his failing to do so the controller shall, in accordance with such procedure as may be prescribed, determine what reference, if any, to other specifications ought to be made in his specification by way of notice to the public.
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