IPR may refer to: Law Intellectual property rights Inter partes review, US procedure for challenging patents Media Independent Public Radio network, Minnesota, US Indie Press Revolution, a sales network for role-playing games WBST (Indiana Public Radio), a public radio network in east central Indiana Interlochen Public Radio, Michigan, United States Iowa Public Radio, US Organisations Institute for Plasma Research, India Institute of Pacific Relations (1925–1960) Institute for Policy Research and Catholic Studies, Washington, DC Mikael Ter-Mikaelian Institute for Physical Research, Armenia Prague Institute of Planning and Development, Czech Republic Science and mathematics Indirect potable reuse of reclaimed water Interproximal reduction, an orthodontic treatment Inverse Participation Ratio, measure of localization or purity of a quantum mechanical state Chemistry i-Pr or iPr, abbreviations for the isopropyl group in organic chemistry IPr, an N-heterocyclic carbene, see IMes Others Indicação de Proveniência Regulamentada (Indication of Regulated Origin), Portuguese wine designation