- Co-inventor of "Optical Transmission Network Management System" by IIT Madras incubator company NMSWorks, Patent applied for in 2008.
- Mani Subramanian and Bill McKinnon, et. al., "Allocating Access Across Shared Communications Medium", Patent No. 7,848,234, December 7, 2010. Patent deployed in ChanneLogics product (now Cisco).
- Mani Subramanian and Bill McKinnon, et. al., "Allocating Access Across Shared Communications Medium", Patent No. 7,184,398, February 27, 2010. Patent deployed in ChanneLogics product (now Cisco).
- Mani Subramanian, "CIMAP - An Integrated System for Operations Centers," Bell Communications Research Exchange, January/February 1987. The system developed is deployed in all Bell Operating Companies now as Work and Force Administration (WAFA).
- Central Computer Backup System Utilizing Localized Data Bases, Patent No. 4,710,870, December 1, 1987.
- Fast Reframing Arrangement for Digital Transmission Systems, Patent No. 3,967,060, June 29, 1976.
- Optical Tracker with Variable Density Spatial Filter, Patent No. 3,723,744, March 27, 1973.
- Apparatus for Use in Measuring Phase Dispersion Produced by Apparatus or a System, Patent No. 3,706,931, December 12, 1972.
- Laser Detection of Clear Air Turbulence, Patent No. 3,540,829, November 17, 1970.