D. P. Mishra, Improved Tandoor Oven, , patent No:1292/DEL/2004;

D. P. Mishra, Recuperative Vortex LPG Burner, IPA No: 3197/DEL/2005    

D. P. Mishra, and S J Swarup, Heat Recuperating Microcombustor, IPA No:2257/DEL/2009

D. P. Mishra, Low emission energy efficient gas burner,  IPA No: 2347/DEL/2009

D. P. Mishra & Manisha B P, "Two-fluid Atomizer",   IPA NO: 1551/DEL/2013.

D. P. Mishra, Hydrogen Gas Burner and Method of Combustion in Hydrogen Burner, 2013, IPA NO: 2545/DEL/2013

Debi Prasad Mishra and Vishnu Hariharan, "Low NOx Fuel Port Array Burner For Emission Control", IPA no: 11052615/Del/2019.