Gregorio Zara

Gregorio Zara Famous Filipino Scientist. Gregorio Zara - famous Filipino scientist Gregorio Y Zara. Filipino scientist Gregorio Y. Zara (D.Sc. Physics) invented, made improvements to, or discovered the following: invented the two-way television telephone or videophone (1955) patented as a "photo phone signal separator network"; discovered the physical law of electrical kinetic resistance called the Zara effect (around 1930); invented an airplane engine that ran on plain alcohol as fuel (1952); improved methods of producing solar energy including creating new designs for a solar water heater (SolarSorber), a sun stove, and a solar battery (1960s); invented a propeller-cutting machine (1952); designed a microscope with a collapsible stage; and helped design the robot Marex X-10.