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  1. P. M. Ajayan and S. Iijima, “Carbon nanotubule enclosing a foreign material”, NEC Corporation, Japan, 1995, U.S. Patent (#5,457,343)
  2. T. W. Ebbesen, P. M. Ajayan and H. Hiura, “Method of Purifying Carbon Nanotubes”, NEC Corporation, Japan, 1997, U.S. Patent (#5,641,466)
  3. R. W. Siegel, S. Chang, R. Doremus and P. M. Ajayan, “Ceramic Matrix Nanocomposites Containing Carbon Nanotubes For Enhanced Mechanical Behavior“, 2002, U.S. Patent (#6,420,293)
  4. Y. P. Zhao, Y. C. Chen, X-C. Zhang, N. Raravikar, P. M. Ajayan, T. M. Lu, G. W. Wang and L. S. Schadler, “Ultrafast All-Optical Switch using Carbon Nanotube Polymer Composites“, 2004, U.S. Patent (#6,782,154)
  5. A. Cao, G. Ramanath and P. M. Ajayan, “Directed assembly of highly-organized carbon nanotubes”, 2007, U.S. Patent (#7,189,430)
  6. P. M. Ajayan, G. Ramanath and Andres de la Gaurdia, “Method of transforming carbon nanotubes”, 2008, U.S. Patent (#7,217,404)
  7. P. M. Ajayan, A. Carrillo, N. Chakrapani, R. Kane and B. Q. Wei, “Carbon nanotube foam and method of making and using thereof“, 2009, U.S. Patent (#7,473,411)
  8. R. W. Siegel, J. Nugent and P. M. Ajayan, “Carbon nanotrees formed by flash CVD method”, 2009, U.S. Patent (#7,504,152)
  9. P. M. Ajayan, B. Q. Wei, H. Zhu, C. Xu and D. Wu, “Direct synthesis of long single-walled carbon nanotube strands”, 2009, U.S. Patent (#7,615,204)
  10. P. M. Ajayan, E. Lahiff, P. Stryjek, C. Y. Ryu and S. Curran, “Embedded nanotube array sensor and method of making a nanotube polymer composite“, 2010, U.S. Patent (#7,673,521)
  11. A. Cao and P. M. Ajayan, “Super-compressible carbon nanotube films and micro-bundles“, 2010, U.S. Patent (#7,727,624)
  12. P. M. Ajayan and A. Dhinojwala, “Aligned carbon nanotube-polymer materials, systems and methods“, 2011, U.S. Patent (#7,927,666)
  13. M. N. G. Nejhad, V. P. Veedu, A. Cao, P. M. Ajayan, D. Askari, Three-dimensionally reinforced multifunctional nanocomposites, 2012, US Patent (#8,148,276)
  14. S. Talapatra, S. Kar, S. Pal, R. Vajtai, P. M. Ajayan, Carbon nanotube growth on metallic substrate using vapor phase catalyst delivery, 2012, US Patent (#(8,207,658)
  15. S. Torti, F. Torti, D. L. Carroll, S. Akman, O. Nalamasu, P. M. Ajayan, Hyperthermic technologies and therapeutic uses thereof, 2012, US Patent (#8,252,772)
  16. P. M. Ajayan, A. Kumar, A. R. Botello-Mendez, H. Gullapalli, M. Terrones, Composition for energy generator, storage, and strain sensor and methods of use thereof, 2012, US Patent (#8,310,134)
  17. A. Dhinojwala, P. M. Ajayan, S. Sethi, Aligned carbon nanotube-polymer materials, systems and methods, 2013, US Patent (8,535,791)
  18. P. M. Ajayan, A. Kumar, A. Goyal, “Synthesis of metal and metal alloy nanoparticles embedded siloxane composites”, 2014, U.S. Patent (#8,906,984)
  19. P.M. Ajayan, B. Pradhan, W. Gao, “Patterned graphite oxide films and methods to make and use same”, 2016, US Patent (9,312,078)
  20. P.M. Ajayan, F. Suong Ou, S.M. Manikoth, S.R. Gowda, L.R. Arava, “Conformal coating on nanostructured electrode materials for three-dimensional applications”, 2016, US Patent (9,312,540)
  21. G. John, P.K. Vemula, P.M. Ajayan, A. Kumar, “Green approach in metal nanoparticle-embedded antimicrobial coatings from vegetable oils and oil based materials”, 2016, US Patent (9,315,676)
  22. P.M. Ajayan, B.J. Carey, “Dynamic strain hardening in polymer nanocomposites”, 2016, US Patent (9,358,730)
  23. M. Majumdar, W. Gao, P.M. Ajayan, T. Naryanan, B. Pradhan, “Graphite oxide coated particulate material and method of making thereof”, 2016, US Patent (9,403,115)
  24. S. Lei, L. Ge, A. George, B. Li, R. Vajtai, P.M. Ajayan, “Charge coupled device based on atomically layered van der waals solid state film for opto-electronic memory and image capture”, 2016, US Patent (9,431,565)
  25. C. Galande, S. Khatiwada, N. Singh, P.M. Ajayan, “Electrodes with three dimensional current collectors and methods of making the same”, 2017, US Patent (9,570,736)
  26. S. Najmaei, L. Zheng, P.M. Ajayan, J. Lou, “Growth methods for controlled large-area fabrication of high-quality graphene analogs”, 2017, US Patent (9,580,834)
  27. C. Galande, N. Singh, S. Khatiwada, P.M. Ajayan, “Methods of preventing corrosion of surfaces by application of energy storage-conversion devices”, 2017, US Patent (9,637,827)
  28. Y.J. Jung, H.Y. Jung, P.M. Ajayan, “Flexible and transparent supercapacitors and fabrication using thin film carbon electrodes with controlled morphologies”, 2018, US Patent (9,881,746)
    – Several other patent applications/provisional pending –