TABLE OF CONTENTS Particular; Chapter-I; NTRODUCTION; Chapter-II; RESEARCH METHODOLOGY; Aim & Objectives; Scope and Limitation; Researchable Question; Hypothesis; Method of Analysis; Source of Data; Mode of Citation; Outline; Submission of Researcher; Reference & Bibliography; Chapter-III; BASIC CONCEPT RELATING TO THE CLAIM CONSTRUCTION; Claim not clearly define; Claim not fairly based; Claim Interpretation; Infringement of Patents; Claim Language; Claim & Disclosure; Don't just obtain a Patent: Build a Patent Position; Chapter-IV; JUDICIAL RESPONSE TO THE ISSUES RELATING TO THE CLAIM CONSTRUCTION; Claim Construction; When should Claim Interpretation occur? What is considered Patent Infringement? Claim Construction Procedure; The Substance of the Claim Construction; Used of Accused Device in Claim Construction; Claim Differentiation of Fallen Doctrine; Chapter- V; ANALYSIS OF DOCTRINE OF EQUIVALENTS; The Doctrine of Equivalents in Patent Infringement; Infringement under the Doctrine of Equivalent; Evolution of the Doctrine of Equivalents; Element by Element Rule; Application of the Doctrine of Equivalent to the Mean-PIus-Function Claims Prosecution History Estoppel Under 'Festo'; • Facts; • Holding; • Consequences; • Opinion (About Festo case); Chapter-VI; CONCLUSION Suggestion Recommendation BIBLIOGRAPHY TABLE OF CASES